Dr. Richard E. Hanson: Publications and Student Research

Published Papers (Peer-Reviewed):

(Asterisk indicates coauthor is or was a graduate or undergraduate student under my supervision)

2018 Salminen, J., Hanson, R., Evans, D.A., Gong, Z., Larson, T., Walker, O., Gumsley, A., Söderlund, U., and Ernst, R., Direct Mesoproterozoic connection of the Congo and Kalahari cratons in proto-Africa: Strange attractors across supercontinental cycles: Geology, v. 46, p. 1011 - 1014.

2016 Hanson, R.E., Roberts, J.M.*, Dickerson, P.W., and Fanning, C.M., Cryogenian intraplate magmatism along the buried southern Laurentian margin: Evidence from volcanic clasts in Ordovician strata, Marathon uplift, west Texas: Geology, v. 44, p. 539 - 542.

2016 Panzik, J.E., Evans, D.A.D., Kasbohm, J.J., Hanson, R., Gose, W., and DesOrmeau, J., Using palaeomagnetism to determine late Mesoproterozoic palaeogeographic history and tectonic relations of the Sinclair Terrane, Namaqua orogen, Namibia, in Li, Z.X., Evans, D.A.D., and Murphy, J.B., eds., Supercontinent cycles through Earth history: Geological Society of London Special Publication 424, , p. 119 -143.

2015 Swanson-Hysell, N.L., Kilian, T.M., and Hanson, R.E., A new grand mean palaeomagnetic pole for the 1.11 Ga Umkondo large igneous province with implications for palaeogeography and the geomagnetic field: Geophysical Journal International, v. 203, p. 2237-2247.

2013 Gose, W.A., Hanson, R.E., Harmer, R.E., and Seidel, E.K.*, Reconnaissance paleomagnetic studies of Mesoproterozoic alkaline igneous complexes in the Kaapvaal craton, South Africa: Journal of African Earth Sciences, v. 85, p. 22-30.

2013 Hanson, R.E., Puckett, R.E., Jr., Keller, G.R., Brueseke, M.E., Bulen, C.L., Mertzman, S.A., Finegan, S.A.*, and McCleery, D.A.*, Intraplate magmatism related to opening of the southern Iapetus Ocean: Cambrian Wichita igneous province in the Southern Oklahoma rift zone: Lithos, v. 174, p. 57-70 (invited paper for special issue on LIPs and Supercontinents).

2012 Bullen, D.S., Hall, R.P., and Hanson, R.E., Geochemistry and petrogenesis of mafic sills in the 1.1 Ga Umkondo large igneous province, southern Africa: Lithos, v. 142-143, p. 116-129.

2011 Hanson, R.E., Rioux, M., Gose, W.A., Blackburn, T.J., Bowring, S.A., Mukwakwami, J., and Jones, D.L., Paleomagnetic and geochronological evidence for large-scale post-1.88 Ga displacement between the Zimbabwe and Kaapvaal cratons along the Limpopo belt: Geology, v. 39, p. 487-490.

2011 Loewy, S.L., Dalziel, I.W.D., Pisarevsky, S., Connelly, J.N., Tait, J., Hanson, R.E., and Bullen, D., Coats Land crustal block, East Antarctica: a ‘tectonic tracer’ for Laurentia?: Geology, v. 39, p. 859-862.

2010 Rioux, M., Bowring, S., Dudás, F., and Hanson, R., Characterizing the U-Pb systematics of baddeleyite through chemical abrasion: Application of multi-step digestion methods to baddeleyite geochronology: Contributions to Mineralogy and Petrology, v. 160, p. 777-801.

2009 Befus, K.S.*, Hanson, R.E., Miggins, D.P., Breyer, J.A., and Busbey, A.B., Nonexplosive and explosive magma/wet-sediment interaction during emplacement of Eocene intrusions into Cretaceous to Eocene strata, Trans-Pecos igneous province, West Texas: Journal of Volcanology and Geothermal Research, v. 181, p. 155-172.

2008 Befus, K.S.*, Hanson, R.E., Lehman, T.M., and Griffin, W.R., Cretaceous basaltic phreatomagmatic volcanism in West Texas: maar complex at Peña Mountain, Big Bend National Park: Journal of Volcanology and Geothermal Research, v. 173, p. 245-264.

2007 Breyer, J.A., Busbey, A.B., Hanson, R.E., Befus, K.E.*, Griffin, W.R., Hargrove, U.S., and Bergman, S.C., Evidence for Late Cretaceous volcanism in Trans-Pecos Texas: Journal of Geology, v. 115, p. 243-251.

2006 Gose, W.A., Hanson, R.E., Dalziel, I.W.D., Pancake, J.A.*, and Seidel, E.K.*, Paleomagnetism of the 1.1 Ga Umkondo large igneous province in southern Africa: Journal of Geophysical Research, v. 111, 18 p. (doi:10.1029/2005JB003897).

2006 Hanson, R.E., Harmer, R.E., Key, R.M., Blenkinsop, T.G., Bullen, D.S., Dalziel, I.W.D., Gose, W.A., Hall, R.P., Kampunzu, A.B., Mukwakwami, J., Munyanyiwa, H., Pancake, J.A.*, Seidel, E.K.*, and Ward, S.E., Mesoproterozoic intraplate magmatism in the Kalahari craton: a review: Journal of African Earth Sciences (special volume on Mesoproterozoic orogenic belts in southern and central Africa), v. 46, p. 141-167.

2004 Hanson, R.E., Crowley, J.L., Bowring, S.A., Ramezani, J., Gose, W.A., Dalziel, I.W.D., Pancake, J.A.*, Seidel, E.K.*, Blenkinsop, T.G., and Mukwakwami, J., Coeval large-scale magmatism in the Kalahari and Laurentian cratons during Rodinia assembly: Science, v. 304, p. 1126-1129.

2004 Hanson, R.E., Gose, W.A., Crowley, J.L., Ramezani, J., Bowring, S.A., Bullen, D.S., Hall, R.P., Pancake, J.A.*, and Mukwakwami, J., Paleoproterozoic intraplate magmatism and basin development on the Kaapvaal craton: age, paleomagnetism and geochemistry of ~1.93 to ~1.87 Ga post-Waterberg dolerites: South African Journal of Geology (special volume on Kaapvaal Craton), v. 107, p. 233-254.

2003 Hanson, R.E., Proterozoic geochronology and tectonic evolution of southern Africa, in Yoshida, M., Windley, B.F., and Dasgupta, S. (eds.), Proterozoic East Gondwana: supercontinent assembly and breakup: Geological Society of London Special Publication 206, p. 427-463.

2003 Hargrove, U.S.*, Hanson, R.E., Martin, M.W., Blenkinsop, T.G., Bowring, S.A., Walker, N., and Munyanyiwa, H., Tectonic evolution of the Zambezi orogenic belt: geochronological, structural, and petrological constraints from northern Zimbabwe: Precambrian Research, v. 123, p. 159-186.

2003 Singletary, S.J.*, Hanson, R.E., Martin, M.W., Crowley, J.L., Bowring, S.A., Key, R.M., Ramokate, L.V., Direng, B.B., and Krol, M.A., Geochronology of basement rocks in the Kalahari Desert, Botswana, and implications for regional Proterozoic tectonics: Precambrian Research, v. 121, p. 47-71.

2003 Templeton, J.H.*, and Hanson, R.E., Jurassic submarine arc-apron deposits and associated magma/wet-sediment interaction, northern Sierra Nevada, California: Journal of Volcanology and Geothermal Research, v. 128, p. 299-326.

2001 Elliot, D.H., and Hanson, R.E., Origin of widespread, exceptionally thick phreatomagmatic tuff breccia in the Middle Jurassic Prebble and Mawson Formations, Antarctica: Journal of Volcanology and Geothermal Research, v. 111, p. 183-201.

2001 Majaule, T., Hanson, R.E., Key, R.M., Singletary, S.J.*, Martin, M.W., and Bowring, S.A., The Magondi belt in northeast Botswana: regional relations and new geochronological data from the Sua Pan area: Journal of African Earth Sciences, v. 32, p. 257-267.

2001 Vinyu, M.L., Hanson, R.E., Martin, M.W., Bowring, S.A., Jelsma, H.A., and Dirks, P.H.G.M., U-Pb zircon ages from a craton-margin Archaean orogenic belt in northern Zimbabwe: Journal of African Earth Sciences, v. 32, p. 103-114.

1999 Hanson, R.E., and Hargrove, U.S.*, Processes of magma/wet-sediment interaction in a large-scale Jurassic andesitic peperite complex, northern Sierra Nevada, California: Bulletin of Volcanology, v. 60, p. 610-626.

1999 Vinyu, M.L., Hanson, R.E., Martin, M.W., Bowring, S.A., Jelsma, H.A., Krol, M.A., and Dirks, P.H.G.M., U-Pb and 40Ar/39Ar geochronological constraints on the tectonic evolution of the easternmost part of the Zambezi orogenic belt, northeast Zimbabwe: Precambrian Research, v. 98, p. 67-82.

1998 Hanson, R.E., Martin, M.W., Bowring, S.A., and Munyanyiwa, H., U-Pb zircon age for the Umkondo dolerites, eastern Zimbabwe: 1.1-Ga large igneous province in southern Africa/East Antarctica and possible Rodinia correlations: Geology, v. 26, p. 1143-1146.

1997 Hargrove, U.S.*, and Hanson, R.E., Geology of the Huntley Mill Lake sill complex: a multiphase peperitic sill intruded into wet sediments, Jurassic, northern Sierra Nevada, California, in Girty, G.H., Hanson, R.E., and Cooper, J.D. (eds.), Geological evolution of the western Cordillera: perspectives from undergraduate research: Society for Sedimentary Geology (SEPM), Pacific Section, Book 82, p. 111-122.

1997 Kulow, M.J.*, Hanson, R.E., and Girty, G.H., The Big Bend shear zone: Early Cretaceous ductile deformation associated with pluton emplacement in the Northern Sierra terrane, California, in Girty, G.H., Hanson, R.E., and Cooper, J.D. (eds.), Geological evolution of the western Cordillera: perspectives from undergraduate research: Society for Sedimentary Geology (SEPM), Pacific Section, Book 82, p. 79-90.

1997 Munyanyiwa, H., Hanson, R.E., Blenkinsop, T.G., and Treloar, P.J., Geochemistry of amphibolites and quartzofeldspathic gneisses in the Pan-African Zambezi belt, northwest Zimbabwe: evidence for bimodal magmatism in a continental rift setting: Precambrian Research, v. 81, p. 179-196.

1997 Wilson, T.J., Grunow, A.M., and Hanson, R.E., Gondwana assembly: the view from southern Africa and East Gondwana: Journal of Geodynamics, v. 23, p. 263-286 (invited paper for special issue on assembly and dispersal of supercontinents).

1996 Grunow, A., Hanson, R.E., and Wilson, T.J., Were aspects of Pan-African deformation linked to Iapetus opening? Geology, v. 24, p. 1063-1066.

1996 Hanson, R.E., and Elliot, D.H., Rift-related Jurassic basaltic phreatomagmatism in the central Transantarctic Mountains: precursory stage to flood-basalt volcanism: Bulletin of Volcanology, v. 58, p. 327-347.

1995 Breyer, J.A., Busbey, A.B., Hanson, R.E., and Roy, E.C., Possible new evidence for the origin of metazoans prior to one b.y. ago: sediment-filled tubes from the Mesoproterozoic Allamoore Formation, Trans-Pecos Texas: Geology, v. 23, p. 269-272.

1995 DeGroat, P.J.*, Donovan, R.N., Hanson, R.E., and Weaver, B.L., Cambrian diabase and gabbro in the Blue Creek Canyon area, Wichita Mountains, southwestern Oklahoma: Oklahoma Geology Notes, v. 55, p. 168-186.

1995 Girty, G.H., Hanson, R.E., Girty, M.S., Schweickert, R.A., Harwood, D.S., Yoshinobu, A.S., Bryan, K.A., Skinner, J.E., and Hill, C.A., Timing of emplacement of the Haypress Creek and Emigrant Gap plutons: implications for the timing and controls of Jurassic orogenesis, northern Sierra Nevada, California, in Miller, D.M., and Busby, C. (eds.), Jurassic magmatism and tectonics of the North American Cordillera: Geological Society of America Special Paper 299, p. 191-201.

1994 Hanson, R.E., Wilson, T.J., and Munyanyiwa, H., Geologic evolution of the Neoproterozoic Zambezi orogenic belt in Zambia: Journal of African Earth Sciences, v. 18, p. 135-150.

1994 Miller, C.A.*, Barton, M., Hanson, R.E., and Fleming, T.H., An Early Cretaceous volcanic arc/marginal basin transition zone, Peninsula Hardy, southernmost Chile: Journal of Volcanology and Geothermal Research, v. 63, p. 33-58.

1993 Girty, G.H., Yoshinobu, A.S., Wracher, M.D., Girty, M.S., Bryan, K.A., Skinner, J.E., McNulty, B.A., Bracchi, K.A., Harwood, D.S., and Hanson, R.E., U-Pb zircon geochronology of the Emigrant Gap composite pluton, northern Sierra Nevada, California: implications for the Nevadan orogeny, in Dunne, G., and McDougall, K. (eds.), Mesozoic paleogeography of the western U.S. - II: Society of Economic Paleontologists and Mineralogists, Pacific Section, Book 71, p. 323-332.

1993 Hanson, R.E., and Wilson, T.J., Large-scale rhyolite peperites (Jurassic, southern Chile): Journal of Volcanology and Geothermal Research, v. 54, p. 247-264.

1993 Hanson, R.E., Wardlaw, M.S., Wilson, T.J., and Mwale, G., U-Pb zircon ages from the Hook granite massif and Mwembeshi dislocation: constraints on Pan-African deformation, plutonism, and transcurrent shearing in central Zambia: Precambrian Research, v. 63, p. 189-209.

1993 Wilson, T.J., Hanson, R.E., and Wardlaw, M.S., Late Proterozoic evolution of the Zambezi belt, Zambia: implications for regional Pan-African tectonics and shear displacements in Gondwana, in Findlay, R.H., Unrug, R., Banks, M.R., and Veevers, J.J. (eds.), Gondwana 8 - assembly, evolution, and dispersal (Gondwana 8 Symposium Volume): Balkema, Rotterdam, p. 69-82.

1992 Bigger, S.E.*, and Hanson, R.E., Devitrification textures and related features in the Carlton Rhyolite in the Blue Creek Canyon area, Wichita Mountains, southwestern Oklahoma: Oklahoma Geology Notes, v. 52, p. 124-142.

1991 Hanson, R.E., Quenching and hydroclastic disruption of andesitic to rhyolitic intrusions in a submarine island-arc sequence, northern Sierra Nevada, California: Geological Society of America Bulletin, v. 103, p. 804-816.

1991 Hanson, R.E., and Wilson, T.J., Submarine rhyolitic volcanism in a Jurassic proto-marginal basin, southern Andes, Chile and Argentina, in Harmon, R.S., and Rapela, C.W. (eds.), Andean magmatism and its tectonic setting: Geological Society of America Special Paper 265, p. 13-27.

1991 Wilson, T.J., Grunow, A.M., Hanson, R.E., and Schmitt, K.R., Subduction complex rocks on Diego Ramirez Islands, Chile, in Thomson, M.R.A., Crame, J.A., and Thomson, J.W. (eds.), Geological evolution of Antarctica: Cambridge University Press, p. 419-421.

1989 Wilson, T.J., Hanson, R.E., and Grunow, A.M., Multistage melange formation within an accretionary complex, Diego Ramirez Islands, southern Chile: Geology, v. 17, p. 11-14.

1988 Hanson, R.E., Saleeby, J.B., and Schweickert, R.A., Composite Devonian island-arc batholith in the northern Sierra Nevada, California: Geological Society of America Bulletin, v. 100, p. 446-457.

1988 Hanson, R.E., Wilson, T.J., and Wardlaw, M.S., Deformed batholiths in the Pan-African Zambezi belt, Zambia: age and implications for regional Proterozoic tectonics: Geology, v. 16, p. 1134-1137.

1988 Hanson, R.E., Wilson, T.J., Brueckner, H.K., Onstott, T.C., Wardlaw, M.S., Johns, C.C., and Hardcastle, K.C., Reconnaissance geochronology, tectonothermal evolution, and regional significance of the Middle Proterozoic Choma-Kalomo block, southern Zambia: Precambrian Research, v. 42, p. 39-61.

1988 Munyanyiwa, H.*, and Hanson, R.E., Geochemistry of marbles and calc-silicate rocks in the Pan-African Zambezi belt, Zambia: Precambrian Research, v. 38, p. 177-200.

1986 Hanson, R.E., and Schweickert, R.A., Stratigraphy of mid-Paleozoic island-arc rocks in part of the northern Sierra Nevada, Sierra and Nevada Counties, California: Geological Society of America Bulletin, v. 97, p. 986-998.

1985 Schweickert, R.A., Bogen, N.L., Girty, G.H., Hanson, R.E., and Merguerian, C., Timing and structural expression of the Nevadan orogeny, Sierra Nevada, California: Reply: Geological Society of America Bulletin, v. 96, p. 1349-1352.

1984 Elthon, D., Hanson, R., Allen, R., and Vergara, H., Unusual ocellar textures in diabases from the Sarmiento ophiolite complex, Chile: Canadian Journal of Earth Sciences, v. 21, p. 376-378.

1984 Elthon, D., Lawrence, J.R., Hanson, R.E., and Stern, C., Modelling of oxygen-isotope data from the Sarmiento ophiolite complex, Chile, in Gass, I.G., Lippard, S.J., and Shelton, A.W. (eds.), Ophiolites and oceanic lithosphere: Geological Society of London Special Publication No. 13, p. 185-197.

1984 Girty, G.H., Wardlaw, M.S., Schweickert, R.A., Hanson, R.E., and Bowring, S.A., Timing of pre-Antler deformation in the Shoo Fly Complex, Sierra Nevada, California: Geology, v. 12,

p. 673-676.

1984 Schweickert, R.A., Bogen, N.L., Girty, G.H., Hanson, R.E., and Merguerian, C., Timing and structural expression of the Nevadan orogeny, Sierra Nevada, California: Geological Society of America Bulletin, v. 95, p. 967-979.

1982 Hanson, R.E., and Schweickert, R.A., Chilling and brecciation of a Devonian rhyolite sill intruded into wet sediments, northern Sierra Nevada, California: Journal of Geology, v. 90, p. 717-724.

1980 Al-Shaieb, Z., Hanson, R.E., Donovan, R.N., and Shelton, J.W., Petrology and diagenesis of sandstones in the Post Oak Formation (Permian), southwestern Oklahoma: Journal of Sedimentary Petrology, v. 50, p. 43-50.

1980 Hanson, R.E., and Al-Shaieb, Z., Voluminous subalkaline silicic magmas related to intracontinental rifting in the Southern Oklahoma aulacogen: Geology, v. 8, p. 180-184.

1977 Al-Shaieb, Z., Olmsted, R.W., Shelton, J.W., May, R.T., Owens, R.T., and Hanson, R.E., Uranium potential of Permian and Pennsylvanian sandstones in Oklahoma: American Association of Petroleum Geologists Bulletin, v. 61, p. 360-375.

Published Papers (Not Peer-Reviewed):

1998 Hargrove, U.S.*, and Hanson, R.E., Large-scale peperites associated with a multiphase andesitic sill intruded into wet sediments, Jurassic, Northern Sierra terrane, California: The Compass (journal of earth sciences of Sigma Gamma Epsilon, the national geological honor society), v. 74, p. 95-102.

1998 Kulow, M.J.*, Hanson, R.E., Girty, G.H., Girty, M.S., and Harwood, D.S., Cretaceous plutonic rocks in the Donner Lake - Cisco Grove area, northern Sierra Nevada, California: The Compass, v. 74, p. 69-76.

1998 Mielke, K.M.*, Hanson, R.E., Girty, G.H., Girty, M.S., and Schweickert, R.A., Jurassic island-arc rocks in the Webber Peak and Meadow Lake areas, Northern Sierra terrane, California: The Compass, v. 74, p. 77-86.

1998 Phillipson, S.E.*, Hanson, R.E., Girty, G.H., and Girty, M.S., Petrology and geochronology of the intrusive suite of Haypress Creek (Middle Jurassic), Northern Sierra terrane, California: The Compass, v. 74, p. 87-94.

1995 Hanson, R.E., and Elliot, D.H., Jurassic phreatomagmatic volcanism in the central Transantarctic Mountains: Antarctic Journal of the U.S., v. 29, no. 5, p. 33-35.

1991 Elliot, D.H., Fleming, T.H., Miller, C.A., and Hanson, R.E., Mesozoic volcanic rocks in the Queen Alexandra Range: Antarctic Journal of the U.S., v. 26, no. 5, p. 3-4.

1990 Hanson, R.E., Wilson, T.J., Wardlaw, M.S., Brueckner, H.K., and Onstott, T.C., A review of new geochronological data for the Proterozoic of central and southern Zambia: Zambian Journal of Applied Earth Sciences, v. 4, p. 6-18.

Published Field Trip Guides:

2014 Eschberger, A.M.*, and Hanson, R.E., Igneous breccia in the West Timbered Hills, Arbuckle Mountains: Origin from explosive basaltic phreatomagmatic processes, in Suneson, N. (ed.), Igneous and Tectonic History of the Southern Oklahoma Aulacogen: Oklahoma Geological Survey Guidebook 38, p. 187-209.

2014 Eschberger, A.M.*, and Hanson, R.E., Stop 3. Mafic-felsic igneous breccia in the West Timbered Hills, in Suneson, N. (ed.), Igneous and Tectonic History of the Southern Oklahoma Aulacogen: Oklahoma Geological Survey Guidebook 38, p. 15-20.

2014 Eschberger, A.M.*, Hanson, R.E., and Puckett, R.E. Jr., Carlton Rhyolite Group and diabase intrusions in the East Timbered Hills, Arbuckle Mountains, in Suneson, N. (ed.), Igneous and Tectonic History of the Southern Oklahoma Aulacogen: Oklahoma Geological Survey Guidebook 38, p. 143-186.

2014 Eschberger, A.M.*, Hanson, R.E., and Puckett, R.E., Jr., Stop 2. Carlton Rhyolite and diabase intrusions in the East Timbered Hills, in Suneson, N. (ed.), Igneous and Tectonic History of the Southern Oklahoma Aulacogen: Oklahoma Geological Survey Guidebook 38, p. 7-14.

2014 Finegan, S.A.*, and Hanson, R.E., Carlton Rhyolite Group in the Fort Sill area, Wichita Mountains, in Suneson, N. (ed.), Igneous and Tectonic History of the Southern Oklahoma Aulacogen: Oklahoma Geological Survey Guidebook 38, p. 211-254.

2014 Hanson, R.E., and Eschberger, A.M.*, An overview of the Carlton Rhyolite Group: Cambrian A-type felsic volcanism in the Southern Oklahoma Aulacogen, in Suneson, N. (ed.), Igneous and Tectonic History of the Southern Oklahoma Aulacogen: Oklahoma Geological Survey Guidebook 38, p. 123-141.

2014 Hanson, R.E., and Philips, C.M.*, Stop 4. Carlton Rhyolite and diabase intrusions in the Blue Creek Canyon area of the Slick Hills, in Suneson, N. (ed.), Igneous and Tectonic History of the Southern Oklahoma Aulacogen: Oklahoma Geological Survey Guidebook 38, p. 21-26.

2014 Hanson, R.E., Burkholder, B.K.*, Donovan, R.N., Dart, J.C.*, Frazier, S.J.*, McCleery, D.A.*, Philips, C.M.*, and Pollard, J.B.*, Physical volcanology and geochemistry of the Carlton Rhyolite in the Slick Hills, Wichita Mountains, in Suneson, N. (ed.), Igneous and Tectonic History of the Southern Oklahoma Aulacogen: Oklahoma Geological Survey Guidebook 38, p. 255-297.

2014 Puckett, R.E., Jr., Hanson, R.E., Eschberger, A.M.*, Brueseke, M.E., Bulen, C.L., and Price, J.D., New insights into the Early Cambrian igneous and sedimentary history of the the Arbuckle Mountains area of the Southern Oklahoma Aulacogen from basement well penetrations, in Suneson, N. (ed.), Igneous and Tectonic History of the Southern Oklahoma Aulacogen: Oklahoma Geological Survey Guidebook 38, p. 61-93.

2012 White, J.C., Miggins, D.P., Barker, D.S., Parker, D.F., Befus, K.S.*, and Hanson, R.E., Magmatism in Big Bend National Park: Recent Studies: South-Central Section, Geological Society of America Field Trip Guidebook, 68 p.

2000 Hanson, R.E., Girty, G.H., Harwood, D.S., and Schweickert, R.A., Paleozoic subduction complex and Paleozoic-Mesozoic island-arc volcano-plutonic assemblages in the northern Sierra terrane, in Lageson, D.R., Peters, S.G., and Lahren, M.M. (eds.), Great Basin and Sierra Nevada: Geological Society of America Field Guide Series, v. 2, 255-277.

1999 Schweickert, R.A., Hanson, R.E., and Girty, G.H., Accretionary tectonics of the western Sierra Nevada metamorphic belt, in Wagner, D.L., and Graham, S.A. (eds.), Geologic field trips in northern California (for Centennial Meeting of the Cordilleran Section of the Geological Society of America): California Division of Mines and Geology Special Publication 119, p. 33-79.

1996 Hanson, R.E., Girty, G.H., Girty, M.S., Hargrove, U.S.*, Harwood, D.S., Kulow, M.J.*, Mielke, K.L.*, Phillipson, S.E.*, Schweickert, R.A., and Templeton, J.H.*, Paleozoic and Mesozoic arc rocks in the Northern Sierra terrane, in Girty, G.H., Hanson, R.E., Harwood, D.S., and Schweickert, R.A. (eds.), The Northern Sierra terrane and associated Mesozoic magmatic units: implications for the tectonic history of the western Cordillera: Society for Sedimentary Geology (SEPM), Pacific Section, Book 81, p. 25-55.

1993 Hanson, R.E., Girty, G.H., Harwood, D.S., Schweickert, R.A., Templeton, J.H.*, Yoshinobu, A.S., Wracher, M.D., and Girty, M.S., Devonian and Jurassic volcano-plutonic associations in the Northern Sierra terrane: implications for arc evolution and Mesozoic deformation, in Lahren, M.M., Trexler, J.H., Jr., and Spinosa, C. (eds.), Crustal evolution of the Great Basin and the Sierra Nevada: Cordilleran/Rocky Mountain Section, Geological Society of America Field Trip Guidebook, Department of Geological Sciences, University of Nevada, Reno, p. 97-128.

1989 Hanson, R.E., Geology of Peninsula Hardy, Isla Hoste (southern Chile), in Dalziel, I.W.D. (ed.), Tectonics of the Scotia Arc, Antarctica: 28th International Geological Congress, Field Trip Guidebook T 180, p. 71-76.

1989 Wilson, T.J., Hanson, R.E., and Grunow, A.M., Geology of Islas Diego Ramirez (southern Chile), in Dalziel, I.W.D. (ed.), Tectonics of the Scotia Arc, Antarctica: 28th International Geological Congress, Field Trip Guidebook T 180, p. 76-81.

1984 Schweickert, R.A., Harwood, D.S., Girty, G.H., and Hanson, R.E., Tectonic development of the Northern Sierra terrane: an accreted late Paleozoic island arc and its basement, in Lintz, J. (ed.), Western geological excursions: Geological Society of America 1984 Annual Meeting, Field Trip Guides, v. 4, p. 1-65.

1978 Al-Shaieb, Z., Donovan, R.N., Hanson, R.E., Morrison, C.M., Olmsted, R.W., and Shelton, J.W., Guidebook to uranium mineralization in sedimentary and igneous rocks of Wichita Mountains region, southwestern Oklahoma: American Association of Petroleum Geologists, 1978 Convention, Energy Minerals Division, Field Trip Guidebook, 73 p.

Edited Volumes:

2006 McCourt, S., Hanson, R.E., and Key, R. (eds.), Mesoproterozoic orogenic belts in southern and central Africa: Journal of African Earth Sciences Special Issue.

1997 Girty, G.H., Hanson, R.E., and Cooper, J.D. (eds.), Geological evolution of the western Cordillera: perspectives from undergraduate research: Society for Sedimentary Geology (SEPM), Pacific Section, Book 82, 135 p.

1996 Girty, G.H., Hanson, R.E., Harwood, D.S., and Schweickert, R.A. (eds.), The Northern Sierra terrane and associated Mesozoic magmatic units: implications for the tectonic history of the western Cordillera: Society for Sedimentary Geology (SEPM), Pacific Section, Book 81, 92 p.

Published Maps:

2014 Harwood, D.S., Fisher, G.R., and Hanson, R.E., Geologic map of part of Eastern Placer County, northern Sierra Nevada, California: California Geological Survey, California Department of Conservation, Sacramento, CA (1:48,000, with accompanying 37-page pamplet).

1996 Unrug, R. (ed.), Geodynamic map of Gondwana supercontinent assembly: Bureau de Recherches Géologiques et Minières, Orléans, France (1:10,000,000). I am one of 67 co-authors and together with Dr. T.J. Wilson, Ohio State Univ., was responsible for parts of Zambia and adjacent countries.

Invited Research Website:

2011 Hanson, R.E., Puckett, R.E., Jr., McCleery, D.A.*, Brueseke, M.E., Bulen, C.L., and Mertzman, S.A., The Cambrian Wichita bimodal large igneous province in the Southern Oklahoma rift zone: Large Igneous Provinces Commission, International Association of Volcanology and Chemistry of the Earth’s Interior (LIP of the month for Nov., 2011): http://www.largeigneousprovinces.org/11nov.

Published Abstracts of Papers Presented at Professional Meetings:

2019     Hanson, R.E., Wall, C.J., Schmitz, M.D., Price, J.D., Puckett, R.E., and Donovan, N., Precise U-Pb zircon geochronology for the Wichita Igneous Province in southern Oklahoma: Geological context and tectonic implications: Geological Society of America Abstracts with Programs, v. 51, no. 2, doi: 10.1130/abs/2019SC-327078.

2019     Ohrmundt, S.C.*, Hanson, R.E., and Caves, L.R.*, Complex shallow-level andesitic magma plumbing systems and magma/sediment interaction in a Mesoproterozoic volcanic arc setting in Namibia: Geological Society of America Abstracts with Programs, vol. 51, no. 2, doi: 10.1130/abs/2019SC-327355.

2019     Puckett, R.E., Hanson, R.E., and Price, J.D., Subsurface Cambrian felsic igneous rocks of the Southern Oklahoma Aulacogen: Geological Society of America Abstracts with Programs, vol. 51, no. 2, doi: 10.1130/abs/2019SC-326402.

2019     Wall, C.J., Hanson, R.E., Schmitz, M.D., Price, J.D., Puckett, R.E., and Donovan, N., Age of the Wichita Igneous Province: Integrating zircon geochronological and geochemical constraints on voluminous Cambrian magmatism in the Southern Oklahoma Aulacogen: Geological Society of America Abstracts with Programs, vol. 51, no. 2, doi: 10.1130/abs/2019SC-327032.

2018     Caves, L.R.*, Hanson, R.E., and Ohrmundt, S.C.*, Interactions between thick rhyolite sills and wet, unlithified lacustrine sediments in a Mesoproterozoic volcanic arc setting, SW Namibia: Geological Society of America Abstracts with Programs,v. 50, no. 6, doi: 10.1130/abs/2018AM-323890.

2018     Dickerson, P.W., Rodriguez, E., Stockli, D.F., Hanson, R.E., Roberts, J.M.*, and Fanning, C.M., Mesoproterozoic to late Paleozoic supercontinent collisions and fragmentation; the record from south-central Laurentia and insights from zircon U/Pb data: Geological Society of America Abstracts with Programs: v., 50, no. 1, doi: 10.1130/abs/2018SC-310310.

2018     Hanson, R.E., Andrews, V.P.*, Ohrmundt, S.C.*, Lehman, K.M.*, Baylor, D.J.*, and Williams, J.W.*, Eruptive mechanisms, lithofacies patterns and subvolcanic magma plumbing systems in a 1.2 Ga extensional continental margin arc on the edge of the Kalahari Craton, SW Namibia: Geological Society of America Abstracts with Programs, v. 50, no. 1, doi: 10.1130/abs/2018SC-310181.

2018     Lehman, K.M.*, Hanson, R.E., and Andrews, V.P.*, Geochemical constraints on evolving 1.36-1.1 Ga intraplate and volcanic arc regimes in the Konkiep Terrane, Namaqua-Natal orogenic belt, SW Namibia: American Geophysical Union (Fall Meeting), abstract no. V31H–2012.

2018     Ohrmundt, S.C.*, Hanson, R.E., and Caves, L.R.*, Peperites, steam-explosion breccias, intrusive pyroclastic rocks and phreatomagmatic diatremes formed during intrusion of andesitic magma into wet lacustrine strata in a 1.2 Ga intra-arc basin (Barby Formation, SW Namibia): Geological Society of America Abstracts with Programs, v. 50, no. 6, doi: 10.1130/abs/2018AM-323842.

2018     Ohrmundt, S.C.*, Hanson, R.E., and Andrews, V.P., Andesitic pyroclastic intrusions injected laterally into weak lacustrine sediments within a Mesoproterozoic volcanic arc succession, Barby Formation, SW Namibia: Geological Society of America Abstracts with Programs, v. 50, no. 1, doi: 10.1130/abs/2018SC-310189.

2018     Salminen, J., Hanson, R., Evans, D.A., Gong, Z., Larson, T., Walker, O., Gumsley, A., and Ernst, R., Direct Mesoproterozoic connection of Congo and Kalahari cratons in proto-Africa: Abstracts, 2018 African Geocongress, University of Johannesburg, South Africa, July 18-20.

2018     Salminen, J., Hanson, R., Evans, D. A., Gong, Z., Larson, T., Walker, O., Gumsley, A., Söderlund, U., and Ernst, R., Direct Mesoproterozoic connection of the Congo and Kalahari cratons in proto-Africa: 2018 IGCP Field Symposium in South China, From Rodinia to Pangea, Yichang, South China, Nov. 1-9.

2018     Wall, C.J., Schmitz, M., Hanson, R., Price, J.D., and Nowell, D., Precise U-Pb zircon Geochronological Constraints on Voluminous Cambrian magmatism in the Southern Oklahoma Aulacogen: Geological Society of America Abstracts with Programs, v. 50, no. 6, doi: 10.1130/abs/2018AM-323162.

2018     Wall, C.J., Schmitz, M., Hanson, R.E., Price, J.D., and Nowell, D., High-precision U-Pb zircon geochronology of the Wichita igneous province: Abstracts, Annual Goldschmidt Conference (organized by the Geochemical Society and the European Association of Geochemistry), Boston, August 12-17.

2017     Andrews, V.P.*, Hanson, R.E., and Ohrmundt, S.C.*, Exposed pyroclastic vent conduits for monogenetic andesitic volcanoes in a Mesoproterozoic arc sequence, SW Namibia: Geological Society of America Abstracts with Programs, v. 49, no. 6, doi: 10.1130/abs/2017AM-306761.

2017     Andrews, V.P.*, Hanson, R.E., Lehman, K.M.*, Baylor, D.*, and Williams, J.W.*, Volcanic and hypabyssal lithofacies in a Mesoproterozoic volcanic arc sequence, Barby Formation, southwest Namibia: Geological Society of America Abstracts with Programs, v. 49, no. 1, doi: 10.1130/abs/2017SC-289494.

2017     Dickerson, P.W., Rodríquez, E., Stockli, D.F., Hanson, R.E., Roberts, J.M.*, and Fanning C.M., Supercontinents and the life cycle of Iapetus – U/Pb geochronological and geochemical evidence from southern Laurentia: Abstracts, Trans-Iapetus Workshop, University of Hull, U.K., May 25-26.

2017     Hanson, R.E., Boro, J.R.*, Eschberger, A.M.*, and Toews, C.E.*, Cambrian A-type rhyolite lavas, basaltic phreatomagmatic vent conduits and bimodal hypabyssal intrusions emplaced along a rift-bounding fault in the Southern Oklahoma Aulacogen: Geological Society of America Abstracts with Programs, v. 49, no. 1, doi: 10.1130/abs/2017SC-289279.

2017     Ohrmundt, S.C.*, Hanson, R.E., and Andrews, V.P.*, Intrusive pyroclastic rocks formed during explosive andesitic eruptions in a Mesoproterozoic volcanic arc setting, Barby Formation, SW Namibia: Geological Society of America Abstracts with Programs, v. 49, no. 6, doi: 10.1130/abs/2017AM-306948.

2017     Powerman, V., Hanson, R.E., and Girty, G., Provenance of the exotic Northern Sierra terrane (North American Cordillera) based on U-Pb detrital zircon data: American Geophysical Union (Fall meeting), abstract no. T23C-0627.

2017     Puckett, R.E., Hanson, R.E., Brueseke, M.E., Eschberger, A.M.*, Toews, C.E.*, and Boro, J.R.*, Physical volcanology of Cambrian basalts and rhyolites in the Southern Oklahoma Aulacogen from surface exposures and deep drilling penetrations: Geological Society of America Abstracts with Programs, v. 49, no. 1, doi: 10.1130/abs/2017SC-289305.

2016 Andrews, V.P.*, Hanson, R.E., Baylor, D.*, Lehman, K.M.*, and Williams, J.W.*, Intermixed Hawaiian, Strombolian and phreatomagmatic eruption styles in a Mesoproterozoic volcanic arc sequence (Barby Formation) in southwest Namibia: Geological Society of America Abstracts with Programs, v. 48, no.7, doi: 10.1130/abs/2016AM-283694.

2016 Baylor, D.*, Hanson, R.E., and Miggins, D.P., Newly discovered Eocene basaltic phreatomagmatic vents in the Dogie Mountain and Black Peaks areas, Big Bend National Park, west Texas: Geological Society of America Abstracts with Programs, v. 48, no.1, doi: abs/2016SC-273624.

2016 Hanson, R.E., Boro, J.R.*, Eschberger, A.M.*, Finegan, S.A.*, Puckett, R.E., Jr., and Toews, C.E.*, Geochemistry and petrogenesis of extensive A-type, partly peralkaline rhyolites emplaced during Cambrian rifting in the Southern Oklahoma aulacogen: Geological Society of America Abstracts with Programs, v. 48, no.7, doi: 10.1130/abs/2016AM-277275.

2016 Powerman, V., Hanson, R.E., and Girty, G., Paleozoic assemblage of the Northern Sierra terrane: New geochronology and geochemical data from the stitching Late Devonian-Early Carboniferous Bowman Lake batholith, and associated rocks: American Geophysical Union (Fall meeting), abstract no. T11B-2606.

2016 Puckett, R.E., Hanson, R.E., Brueseke, M.E., Price, J.D., Keller, R.G., Bulen, C.L., Eschberger, A.M.*, Hobbs, J.M., and Mertzman, S.A., Structural and petrological insights and contrasts between the Wichita and Arbuckle segments of the Southern Oklahoma aulacogen as revealed by deep drilling into rift-related rocks: Geological Society of America Abstracts with Programs, v. 48, no.7, doi: 10.1130/abs/2016AM-279246.

2016 Xiangyang, X., Hanson, R.E., Finegan, S.A.*, Puckett, R.E., and Wheeler, S., Detrital zircon U-Pb geochronology of Cambrian sandstones in the Southern Oklahoma aulacogen (Meers and Pratt Hill quartzites): Geological Society of America Abstracts with Programs, v. 48, no.7, doi: 10.1130/abs/2016AM-280870.

2015 Boro, J.R.*, Hanson, R.E., Suneson, N.H., and Toews, C.E.*, Physical volcanology of the Carlton Rhyolite Group in the West Timbered Hills, Arbuckle Mountains, southern Oklahoma: Geological Society of America Abstracts with Programs, v. 47, no. 1, p. 9.

2015 Boro, J.R.*, Toews, C.E.*, and Hanson, R.E., Cambrian bimodal volcanic and hypabyssal intrusive lithofacies developed along a major rift-bounding fault in the Southern Oklahoma Aulacogen: Results of new mapping in the West Timbered Hills, Arbuckle Mountains: Geological Society of America Abstracts with Programs, v. 47, no. 7, p. 810-811.

2015 Bucholz, J.F.*, Hanson, R.E., and Miggins, D.P., An unusual Eocene basaltic phreatomagmatic fissure vent in Big Bend National Park, west Texas: Geological Society of America Abstracts with Programs, v. 47, no. 1, p. 18.

2015 Bucholz, J.F.*, Hanson, R.E., and Miggins, D.P., Eruptive styles in Eocene basaltic phreatomagmatic fissure vents, Big Bend National Park, West Texas: Geological Society of America Abstracts with Programs, v. 47, no. 7, p. 810.

2015 Hanson, R.E., Boro, J.R.*, Eschberger, A.M.*, Puckett, R.E., Jr., and Toews, C.E.*, An overview of recent work on Cambrian A-type felsic volcanism in the southern Oklahoma aulacogen: Geological Society of America Abstracts with Programs, v. 47, no. 1, p. 14.

2015 Larson, T., Evans, D., Hanson, R., Hofmann, M., Linnemann, U., and Dalziel, I., New Meso-Neoproterozoic paleomagnetic results from the Congo-São Francisco craton: Abstracts, American Geophysical Union (Joint Assembly), abstract no. PG12A-08.

2015 Puckett, R.E., Jr., Hanson, R.E., Brueseke, M.E., Price, J.D., Bulen, C.L., and Eschberger, A.M.*, New insights into the Early Cambrian igneous and sedimentary history and Precambrian framework of the Southern Oklahoma aulacogen from basement well penetrations: Geological Society of America Abstracts with Programs, v. 47, no. 1, p. 13.

2015 Toews, C.E.*, Hanson, R.E., Boro, J.R.*, and Eschberger, A.M.*, Cambrian basaltic vent conduits in the West Timbered Hills, Arbuckle Mountains, southern Oklahoma: Evidence for explosive phreatomagmatic eruptions during rift-related volcanism: Geological Society of America Abstracts with Programs, v. 47, no. 7, p. 810.

2015 Toews, C.E.*, Hanson, R.E., Boro, J.R.*, Eschberger, A.M.*, and Suneson, N.H., Bimodal Cambrian hypabyssal intrusive rocks and associated basaltic phreatomagmatic vent conduits in the West Timbered Hills, Arbuckle Mountains, southern Oklahoma: Geological Society of America Abstracts with Programs, v. 47, no. 1, p. 19-10.

2015 Xu, X.X., Evans, D.A.D., Panzik, J.E., Linnemann, U., Hofmann, M., Hessert, J., and Hanson, R.E., Paleomagnetism of Mesoproterozoic lavas in the Barby Formation of the Sinclair region, southern Namibia: Geological Society of America Abstracts with Programs, v. 47, no. 7, p. 401.

2014 Dickerson, P.W., Stockli, D.F., Hanson, R.E., and Roberts, J.M.*, Emerging data on Rodinia rifting from Marathon orogenic belt: Geological Society of America Abstracts with Programs, v. 46, no. 6, p. 371.

2014 Hanson, R.E., Miggins, D.P., Befus, K.S.*, Deitz, J.E.*, Hill, J.A.*, and Winkler, C.E.*, Complex hypabyssal intrusive networks associated with widespread Eocene basaltic phreatomagmatic volcanism in the Big Bend region of west Texas: Geological Society of America Abstracts with Programs, v. 46, no. 6, p. 562.

2014 Swanson-Hysell, N., Kilian. T.M., Bowring, S.A., Hanson, R.E., Burgess, S.D., and Ramezani, J., Advancing late Mesoproterozoic paleogeography with new constraints from the Keweenawan rift and the Umkondo large igneous province: Abstracts, American Geophysical Union (Fall meeting).

2013 Eschberger, A.M.*, and Hanson, R.E., 2013, Explosive basaltic phreatomagmatic volcanism during Early Cambrian rifting in southern Oklahoma: Evidence from quarry exposures in the Arbuckle Mountains: Geological Society of America Abstracts with Programs, v. 45, no. 7, p. 536.

2013 Eschberger, A.M.*, and Hanson, R.E., 2013, Cambrian A-type rhyolite lava flows and hypabyssal intrusions in the East Timbered Hills, Arbuckle Mountains, southern Oklahoma: Geological Society of America Abstracts with Programs, v. 45, no. 3, p. 79.

2013 Hanson, R.E., Roberts, J.M.*, Dickerson, P.W., and Fanning, C.M., 2013, Neoproterozoic intraplate magmatism along the southern Laurentian margin: evidence from volcanic clasts in Ordovician strata in the Marathon uplift, West Texas: Geological Society of America Abstracts with Programs, v. 45, no. 3, p. 30.

2013 Hill, J.A.*, and Hanson, R.E., 2013, Insights into magma plumbing systems for phreatomagmatic volcanoes: intrusive Eocene basaltic feeder complex and associated vents east of Peña Mountain, Big Bend National Park, West Texas: Geological Society of America Abstracts with Programs, v. 45, no. 3, p. 78.

2013 Panzik, J.E., Kasbohm, J.J., Evans, D.A.D., Hanson, R.E., and Gose, W.A., Using paleomagnetism to determine paleogeographic history and tectonic relations of the Sinclair terrane, Namibia: Geological Society of America Abstracts with Programs, v. 45, no. 7, p. 113-114.

2013 Puckett, R.E., Jr., Hanson, R., Brueseke, M., Keller, G.R., Eschberger, A.M.*, Bulen, C.L., and Mertzman, S.A., 2013, New insights into the Early Cambrian igneous and sedimentary history of the Southern Oklahoma aulacogen from basement well penetrations: Geological Society of America Abstracts with Programs, v. 45, no. 3, p. 30.

2012 Alsleben, H., Busbey, A., Hanson, R.E., Harris, S., James, C., and Simanek, E., The Pangea mat and cutter – a new, in-class teaching tool to discover plate tectonics: Geological Society of America Abstracts with Programs, v. 44, no. 1, p. 7.

2012 Befus, K.S.*, and Hanson, R.E., Cretaceous basaltic phreatomagmatic volcanism in West Texas: Maar complex at Peña Mountain, Big Bend National Park: Abstracts, Hopi Buttes Field Workshop, Arizona, October 21-27 (sponsored by the International Association of Sedimentologists and the International Association of Volcanology and Chemistry of the Earth’s Interior).

2012 Eschberger, A.M.*, and Hanson, R.E., Volcanology of Cambrian rift-related rhyolites in the East Timbered Hills, Arbuckle Mountains, southern Oklahoma: Geological Society of America Abstracts with Programs, v. 44, no. 1, p. 7.

2012 Finegan, S.A.*, Hanson, R.E., and McCleery, D.A.*, Fort Sill rhyolite: largest known lava flow in the Cambrian rhyolitic volcanic field of southern Oklahoma: Geological Society of America Abstracts with Programs, v. 44, no. 1, p. 5-6.

2012 Frazier, S.J.*, Hanson, R.E., and McCleery, D.A.*, Cambrian volcanic stratigraphy and rhyolite peperite in the Bally Mountain area, SW Oklahoma: Geological Society of America Abstracts with Programs, v. 44, no. 1, p. 7.

2012 Hanson, R.E., Befus, K.S.*, Miggins, D.P., Deitz, J.E.*, and Winkler, C.E.*, Results of ongoing work on Eocene basaltic phreatomagmatic vents in Big Bend National Park and adjacent areas, Trans-Pecos igneous province, West Texas: Geological Society of America Abstracts with Programs, v. 44, no. 1, p. 30.

2012 Hanson, R.E., Hill, J.A.*, Befus, K.S.*, Deitz, J.E.*, and Miggins, D.P., Eocene diatreme feeder conduits to basaltic maar volcanoes in the Trans-Pecos igneous province, West Texas: Abstracts, Hopi Buttes Field Workshop, Arizona, October 21-27 (sponsored by the International Association of Sedimentologists and the International Association of Volcanology and Chemistry of the Earth’s Interior).

2012 Hanson, R.E., Roberts, J.M.*, Dickerson, P.W., and Fanning, C.M., Volcanic clasts within Ordovician strata in the Marathon fold-thrust belt, West Texas, reveal evidence for Neoproterozoic (~706 Ma) alkaline intraplate magmatism along the southern Laurentian margin: Geological Society of America Abstracts with Programs, v. 42, no. 5, p. 268.

2012 Hill, J.A.*, Hanson, R.E., Miggins, D.P., Deitz, J.E.*, Befus, K.S.*, and Winkler, C.E.*, Magma plumbing systems for Eocene basaltic maar volcanoes and phreatomagmatic fissure vents in the Trans-Pecos igneous province, West Texas: Abstracts, Hopi Buttes Field Workshop, Arizona, October 21-27 (sponsored by the International Association of Sedimentologists and the International Association of Volcanology and Chemistry of the Earth’s Interior).

2012 Panzik, J.E., Kasbohm, J.J., Evans, D.A.D., Hanson, R.E., and Gose, W.A., Using paleomagnetism to determine paleogeographic history and tectonic relations of the Sinclair terrane, Namibia: Geological Society of America Abstracts with Programs, v. 44, no. 1, p. 30.

2012 Puckett, R.E., Jr., Hanson, R.E., and Eschberger, A.M.*, Profiling the buried Cambrian sedimentary and bimodal igneous stratigraphy of the Southern Oklahoma rift zone using basement well penetrations: Geological Society of America Abstracts with Programs, v. 44, no. 1, p. 10.

2012 Roberts, J.M.*, Dickerson, P.W., Hanson, R.E., and Fanning, C.M., Geochemistry and tectonic significance of volcanic clasts contained in Lower, Middle and Upper Ordovician off-shelf sediment gravity-flow deposits in the Marathon fold-thrust belt, west Texas: Geological Society of America Abstracts with Programs, v. 44, no. 1, p. 9.

2011 Dickerson, P.W., Roberts, J.M.*, Hanson, R.E., and Fanning, C.M., Volcanic clasts in Lower to Middle Ordovician strata of the western Ouachita-Cuyania basin: evidence of rift-related magmatism along the south-central Laurentian margin, in Schmitt, R.S., Trouw, R., Carvalho, I.S., and Collins, A., (eds.), Gondwana 14, Abstracts: Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil, p. 179.

2011 Hanson, R.E., Puckett, R.E., Jr., Burkholder, B.K.*, Eschberger, A.M.*, Finegan, S.A.*, Frazier, S.J.*, McCleery, D.A.*, Philips, C.M.*, and Pollard, J.B.*, Voluminous A-type rhyolites within a major, largely buried Cambrian rift zone in southern Oklahoma: Geological Society of America Abstracts with Programs, v. 43, no. 5, p. 651.

2011 Hanson, R.E., Rioux, M., Bowring, S.A., Gose, W.A., Bartholomew, L.T.*, Kilian, T.M., Evans, D.A.D., Panzik, J., Hoffmann, K.H., and Reid, D.L., Constraints on Neoproterozoic intraplate magmatism in the Kalahari craton: geochronology and paleomagnetism of ~890-795 Ma extension-related igneous rocks in SW Namibia and adjacent parts of South Africa: Geological Society of America Abstracts with Programs, v. 43, no. 5, p. 371.

2011 Puckett, R.E., Jr., Hanson, R., Eschberger, A.M.*, Bulen, C.L., and Brueseke, M., Using basement wells to investigate the subsurface Cambrian bimodal volcanic record in the Southern Oklahoma aulacogen: Geological Society of America Abstracts with Programs, v. 43, no. 5, p. 437.

2010 Deitz, J.E.*, Hanson, R.E., Miggins, D.P., and Winkler, C.E.*, Eocene(?) basaltic dike-sill network and phreatomagmatic vents emplaced into unlithified Cretaceous to Paleocene strata, Study Butte area, Big Bend National Park, west Texas: Geological Society of America Abstracts with Programs, v. 42, no. 2, p. 106.

2010 Dickerson, P.W., Hanson, R.E., Roberts, J.M.*, and Fanning, C.M., Volcanism in the western Ouachita-Cuyania basin and separation of Laurentia and Gondwana: Abstracts, GEOSUR 2010: International Geological Congress on the Southern Hemisphere, Mar del Plata, Argentina.

2010 McCleery, D.A.*, and Hanson, R.E., Geochemistry of Cambrian rhyolites in the Wichita Mountains, southwestern Oklahoma: A-type felsic volcanism within the southern Oklahoma aulacogen: Geological Society of America Abstracts with Programs, v. 42, no. 2, p. 105-106.

2010 McCleery, D.A.*, and Hanson, R.E., Trace-element constraints on the petrogenesis of A-type rhyolites emplaced during Cambrian rifting in the southern Oklahoma aulacogen: Geological Society of America Abstracts with Programs, v. 42, no. 5, p. 102.

2010 Roberts, J.M.*, Hanson, R.E., Dickerson, P.W., and Fanning, C.M., Basalt-trachyandesite-trachyte clasts within Ordovician deep-marine conglomerates in the Marathon fold-thrust belt, West Texas: implications for anorogenic magmatism along the southern Laurentian margin: Geological Society of America Abstracts with Programs, v. 42, no. 5, p. 268.

2009 Bartholomew, L.T.*, Hanson, R.E., Gose, W.A., Rioux, M., Bowring, S.A., Hoffmann, K.H., and Reid, D., New paleomagnetic results for Neoproterozoic intraplate igneous rocks in southern Namibia and adjacent parts of South Africa: Geological Society of America Abstracts with Programs, v. 41, no. 2, p. 32.

2009 Befus, K.S.*, Hanson, R.E., Miggins, D.P., Breyer, J.A., and Busbey, A.B., Nonexplosive and explosive magma/wet-sediment interaction in the shallow subsurface during Eocene magmatism in the Trans-Pecos igneous igneous province, Texas: Geological Society of America Abstracts with Programs, v. 41, no. 2, p. 4.

2009 Hanson, R., Gose, W., Rioux, M., Bowring, S., and Jones, D., Unraveling the Proterozoic LIP record of southern Africa: age of the Mashonaland province, Zimbabwe, and regional implications: Geological Society of America Abstracts with Programs, v. 41, no. 7, p. 370.

2009 Hanson, R.E., McCleery, D.A.*, Crowley, J.L., Bowring, S.A., Burkholder, B.A.*, Finegan, S.A.*, Philips, C.M.*, and Pollard, J.B.*, Large-scale Cambrian rhyolitic volcanism in southern Oklahoma related to opening of Iapetus: Geological Society of America Abstracts with Programs, v. 41, no. 2, p. 14.

2009 Rioux, M., Bowring, S., Dudás, F., and Hanson, R., Multi-step dissolution of baddeleyite for ID-TIMS U-Pb dating: Abstracts for 19^th Annual Goldschmidt Conference (Geochimica et Cosmochimica Acta, Supplement), v. 73, p. A1104.

2009 Rioux, M., Bowring, S., Dudás, F., and Hanson, R., Characterizing the U-Pb systematics of baddeleyite through chemical abrasion: Application of multi-step digestion methods to baddeleyite geochronology: American Geophysical Union Transactions, v. 90, Fall Meeting Supplement, Abstract V33B-2039.

2009 Winkler, C.E.*, Hanson, R.E., and Miggins, D.P., A newly discovered Eocene(?) basaltic phreatomagmatic vent complex in Big Bend National Park, Trans-Pecos Texas: Geological Society of America Abstracts with Programs, v. 41, no. 2, p. 10-11.

2008 Hanson, R.E., Gose, W.A., and Harmer, R.E, Paleomagnetism of Mesoproterozoic alkaline and carbonatitic complexes in the Kaapvaal craton, South Africa: Geological Society of America Abstracts with Programs, v. 40, no. 3, p. 12.

2007 Bowring, S.A., Schoene, B., Ramezani, J., Rioux, M., and Hanson, R.E., High-precision U-Pb geochronology of large igneous provinces: Geological Society of America Abstracts with Programs, v. 39, no. 6, p. 97.

2007 Gose, W.A., Hanson, R., Rioux, M., Bartholomew, T.*, Bowring, S.A., Dunnett, T., Hoffmann, K.H., and Reid, D., Paleomagnetism and geochronology of Neoproterozoic intraplate igneous rocks in the SW Kalahari craton, Namibia and South Africa: Geological Society of America Abstracts with Programs, v. 39, no. 6, p. 286-287.

2007 Hanson, R., Gose, W., and Bowring, S., Proterozoic intraplate igneous provinces in southern Africa: The need for integrated paleomagnetic and geochronological studies: Geological Society of America Abstracts with Programs, v. 39, no. 6, p. 98.

2007 Hanson, R., Befus, K.*, Breyer, J., Busbey, A., Lehman, T., and Miggins, D., Newly recognized Cretaceous and Eocene basaltic phreatomagmatic volcanism in the Big Bend area, West Texas: Geological Society of America Abstracts with Programs, v. 39, no. 6, p. 511-512.

2006 Befus, K.S.*, Hanson, R.E., Breyer, J.A., and Busbey, A.B., Nonexplosive magma/wet-sediment interaction and explosive phreatomagmatism associated with Eocene basaltic intrusions, Big Bend area, West Texas: Geological Society of America Abstracts with Programs, v. 38, no. 7, p. 564.

2006 Befus, K.*, Hanson, R., Breyer, J., and Busbey, A., Paleogene peperites developed in Cretaceous to Paleogene strata in the Big Bend area of West Texas: Geological Society of America Abstracts with Programs, v. 38, no. 1, p. 35.

2006 Befus, K.*, Hanson, R., Lehman, T., and Breyer, J., Late Cretaceous phreatomagmatic volcanism at Peña Mountain, Big Bend National Park, Texas: Geological Society of America Abstracts with Programs, v. 38, no. 1, p. 30.

2006 Burkholder, B.K.*, and Hanson, R.E., Carlton Rhyolite on Zodletone Mountain, southern Oklahoma: Geological Society of America Abstracts with Programs, v. 38, no. 1, p. 30.

2006 Finegan, S.A.*, and Hanson, R.E., Field relations of the Carlton Rhyolite in the Fort Sill area, southwestern Oklahoma: Geological Society of America Abstracts with Programs, v. 38, no. 1, p. 30.

2006 Gose, W.A., and Hanson, R.E., The Paleoproterozoic APWP of the Kalahari craton: American Geophysical Union Transactions, v. 87, Joint Assembly Supplement, Abstract GP23A-03.

2006 Hanson, R.E., Befus, K.S.*, Breyer, J.A., Busbey, A.B., Griffin, W.R., Hargrove, U.S., and Lehman, T.M., Volcanology, geochronology, and stratigraphic framework of Upper Cretaceous basaltic maar deposits in the Big Bend area of West Texas: Geological Society of America Abstracts with Programs, v. 38, no. 7, p. 564.

2005 Breyer, J.A., Busbey, A.B., Hanson, R.E., Griffin, W.R., Hargrove, U.S., and Bergman, S.C., New evidence for Late Cretaceous volcanic activity in Trans-Pecos Texas: Geological Society of America Abstracts with Programs, v. 37, no. 3, p. 11.

2005 Gose, W.A., and Hanson, R.E., Relations of the Kalahari craton to Rodinia: paleomagnetic evidence: Abstracts, Supercontinents and Earth Evolution Symposium: Geological Society of Australia Abstracts No. 81, p. 80.

2005 Hanson, R.E., Rodinia: the African perspective: Abstracts, Supercontinents and Earth Evolution Symposium: Geological Society of Australia Abstracts No. 81, p. 78 (invited keynote talk for session on Africa).

2005 Hanson, R.E., Crowley, J.L., and Bowring, S.A., Widespread 1.1 Ga intraplate magmatism in the Laurentian, Kalahari, and Australian cratons during assembly of the Rodinia supercontinent: review and implications: Geological Society of America Abstracts with Programs, v. 37, no. 3, p. 14-15.

2005 Templeton, J.*, Hanson, R., Hargrove, U.*, and Ruff, K.*, Regional Jurassic submarine arc-apron complex in the northern Sierra Nevada, California: American Geophysical Union Transactions, 56 (18), p. JA531.

2004 Berkebile, M.S.*, Hanson, R.E., Gose, W.A., and Harwood, D.S., Geologic and paleomagnetic studies of a Pliocene volcanic debris-avalanche deposit in the northern Sierra Nevada, California: Geological Society of America Abstracts with Programs, v. 36, no. 4, p. 9.

2004 Bullen, D.S., Hall, R.P., and Hanson, R.E., Proterozoic mafic magmatism on the Kalahari craton: evidence from sills in southern Africa: Abstracts, Joint Annual Meeting, Geochemistry, Metamorphic Studies and Volcanic and Magmatic Studies Groups, Bath, England, 98.

2004 Hanson, R., Gose, W., Crowley, J., Ramezani, J., Bowring, S., Pancake, J.*, and Mukwakwami, J., Post-Bushveld Paleoproterozoic intraplate magmatism in southern Africa: Geological Society of America Abstracts with Programs, v. 36, no. 5, p. 206.

2003 Hanson, R.E., Mesoproterozoic tectonic evolution of the Kalahari craton: implications for Rodinia reconstructions: Geological Society of America Abstracts with Programs, v. 35, no. 6, p. 302.

2003 Gose, W., Hanson, R., Pancake, J.*, Crowley, J., Ramezani, J., Bowring, S., Blenkinsop, T., Mukwakwami, J., and Dalziel, I., New paleomagnetic and geochronological data from the Mesoproterozoic Umkondo dolerites, southern Africa: Geophysics Research Abstracts, v. 5, 07201 (European Geophysical Union Meeting, Nice, France).

2002 Busbey, A.B., Bittick, S., Dennie, D., Kirkland, R., Murray, J., Musselman, Z., Breyer, J.A., Hanson, R., Morgan, K.M., and Slattery, M., Summary of recent studies in the Rosillos Mountains, Brewster Co., Texas: Geological Society of America Abstracts with Programs, v. 34, no. 3, p. A12.

2002 Hanson, R., Pancake, J.*, Crowley, J., Ramezani, J., Bowring, S., Dalziel, I., Gose, W., Blenkinsop, T., and Mukwakwami, J., Correlation of 1.1 Ga large igneous provinces on the Laurentia and Kalahari cratons: implications for Rodinia reconstructions: Geological Society of America Abstracts with Programs, v. 34, no. 6, p. 561.

2001 Hall, R.P., Ward, S.E., and Hanson, R.E., Mesoproterozoic mafic intrusives of northern Zimbabwe and Botswana: evidence for the Umkondo LIP? Abstracts, 4th International Conference, Project 418 (Kibaran of Southwestern Africa), International Geological Correlation Program (University of Durban-Westville, South Africa, July 13), p. 10-11.

2001 Hanson, R.E., An outline of the main Mesoproterozoic orogenic provinces of southern Africa: Abstracts, 4th International Conference, Project 418 (Kibaran of Southwestern Africa), International Geological Correlation Program (University of Durban-Westville, South Africa, July 13), p. 3-4.

2001 Hanson, R., Singletary, S.*, Martin, M., Bowring, S., Key, R., Direng, B., Majaule, T., Ramokate, L., and Krol, M., Tectonic links between Proterozoic orogenic belts in southern Africa beneath the Kalahari Desert: Geological Society of America Abstracts with Programs, v. 33, no. 6, p. A436.

2001 Mukwakwami, J., Blenkinsop, T., Hanson, R., and Munyanyiwa, H., Umkondo igneous province and Mesoproterozoic Umkondo basin in eastern Zimbabwe: possible relevance to Rodinia: Geological Society of America Abstracts with Programs, v. 33, no. 6, p. A155.

2001 Pancake, J.A.*, Gose, W.A., Hanson, R.E., Ramezani, J., Bowring, S.A., and Downey, W.S., Paleomagnetism and geochronology of the 1.1 Ga Umkondo igneous province: new data from Botswana: Abstracts, 4th International Conference, Project 418 (Kibaran of Southwestern Africa), International Geological Correlation Program (University of Durban-Westville, South Africa, July 13), p. 8-9.

2001 Pancake, J.*, Hanson, R., Gose, W., Ramezani, J., and Bowring, S., Paleomagnetism and geochronology of widespread dolerite sills in Botswana related to the 1.1 Ga Umkondo large igneous province: Geological Society of America Abstracts with Programs, v. 33, no. 6, p. A436.

2001 Philips, C.M.*, and Hanson, R.E., Anatomy of an A-type Cambrian felsic volcanic field: Carlton Rhyolite in the Blue Creek Canyon area, Wichita Mountains, southern Oklahoma: Geological Society of America Abstracts with Programs, v. 33, no. 5, p. A24.

2000 Hanson, R.E., Proterozoic tectonic evolution of southern Africa: Abstracts Volume (on CD-ROM), 31st International Geological Congress (Rio de Janeiro, Brazil, August 6-17; invited talk for Special Session on Proterozoic Crustal Evolution).

2000 Hanson, R.E., Overview of the Neoproterozoic tectonic evolution of southern Africa: Geological Society of America Abstracts with Programs, v. 32, no. 7, p. A247.

2000 Hargrove, U.S.*, Hanson, R.E., Mariga, J.*, and Whittington, A.L.*, Tectonic evolution of the eastern part of the Zambezi belt in Zimbabwe: implications for the East African orogen: Geological Society of America Abstracts with Programs, v. 32, no. 7, p. A248.

2000 Pollard, J.*, and Hanson, R.E., Carlton Rhyolite at Bally Mountain, Southwest Oklahoma: evidence for extensive A-type Cambrian felsic flows in the Southern Oklahoma aulacogen: Geological Society of America Abstracts with Programs, v. 32, no. 3, p. A39.

1999 Blenkinsop, T.G., Treloar, P.J., and Hanson, R., Rheology of granite magmas during emplacement: Synmagmatic folding and magmatic axial planar fabrics in the Chilimanzi granites of the Zimbabwe craton: Abstracts for Meeting on Deformation Mechanisms, Rheology, and Microstructures (organized by GeofroschunsZentrum Potsdam and Justus-Liebig Universitat, Geissen; held at Neustadt an der Weinstrasse, Germany, March 26-29), p. 14.

1999 Hanson, R.E., Umkondo igneous province (1100 Ma) in southern Africa and East Antarctica: implications for Rodinia correlations: Abstracts for International Geological Correlation Program Conference: Zambia 1999 (Geological Society of Zambia, Kitwe, Zambia, July 12-26), p. 11-12.

1999 Hanson, R.E., Bowring, S.A., and Dalziel, I.W.D., Emplacement of large igneous provinces in the Kalahari and Laurentian cratons at 1.1 Ga: implications for Rodinia assembly: Geological Society of America Abstracts with Programs, v. 31, no. 7, p. A430.

1999 Murray, J.K., Morgan, K.M., Busbey, A.B., Breyer, J.A., and Hanson, R.E., New insights on the geology of the southern flank of the Rosillos Mountains laccolith, Trans-Pecos Texas, from spectral-reflectance cluster analysis: Geological Society of America Abstracts with Programs, v. 31, no. 7, p. A175-176.

1999 Whittington, A.*, Busbey, A., Hanson, R., and Morgan, K., Remote-sensing study of structural relations between the Pan-African Zambezi and Mozambique orogenic belts in NE Zimbabwe and adjacent parts of Mozambique: Geological Society of America Abstracts with Programs, v. 31, no. 1, p. A-37.

1998 Busbey, A.B., Breyer, J.A., and Hanson, R., Late Cretaceous volcanic activity in the Trans-Pecos magmatic province, Texas: Geological Society of America Abstracts with Programs, v. 30, no. 7, p. A178.

1998 Elliot, D.H., and Hanson, R.E., Ferrar phreatomagmatism: precursor to flood basalt eruption in Antarctica: Journal of African Earth Sciences, v. 27, no. 1A, p. 65-66 (special abstract issue for 10th International Gondwana Conference, Capetown, South Africa, June 28-July 4).

1998 Hanson, R.E., Martin, M.W., Bowring, S.A., and Munyanyiwa, H., U-Pb zircon age for the Umkondo dolerites, eastern Zimbabwe: 1.1-Ga large igneous province in southern Africa/East Antarctica and possible Rodinia correlations: Geological Society of America Abstracts with Programs, v. 30, no. 7, p. A292.

1998 Hanson, R.E., Hargrove, U.S.*, Martin, M.W., Bowring, S.A., Krol, M.A., Hodges, K.V., Munyanyiwa, H., and Blenkinsop, T.G., New geochronological constraints on the tectonic evolution of the Pan-African Zambezi belt, south-central Africa: Journal of African Earth Sciences, v. 27, no. 1A, p. 104-105 (special abstract issue for 10th International Gondwana Conference, Capetown, South Africa, June 28-July 4).

1998 Hanson, R.E., Singletary, S.J.*, Martin, M.W., Bowring, S.A., Key, R.M., Majaule, T., Mapeo, R.B.M., Ramokate, L.V., Direng, B., and McMullan, S.R., Geochronology of Proterozoic basement terranes in the Kalahari region of Botswana: progress report: Abstracts, International Conference on the Role of a National Geological Survey in Sustainable Development (Geological Survey of Botswana, Gaborone, Botswana, June 23-25), p. 41-43.

1998 Hargrove, U.S.*, Martin, M., Hanson, R., Singletary, S.*, Bowring, S., Krol, M., and Munyanyiwa, H., Tectonic inversion of Paleo- to Neoproterozoic metamorphic rocks in the Zambezi belt, Mt. Darwin area, NE Zimbabwe: Geological Society of America Abstracts with Programs, v. 30, no. 7, p. A292.

1998 Kulow, M.*, Hanson, R., Girty, G., Girty, M., and Harwood, D., Cretaceous plutonic rocks in the Donner Pass area, northern Sierra Nevada, California: field relations and zircon geochronology: Geological Society of America Abstracts with Programs, v. 30, no. 5, p. 49.

1998 Majaule, T., Key, R., Hanson, R., and Martin, M., The southwestern margin of the Magondi belt in NE Botswana; new geological and geochronological information from the Sua Pan area, Botswana: Abstracts, International Conference on the Role of a National Geological Survey in Sustainable Development (Geological Survey of Botswana, Gaborone, Botswana, June 23-25), p. 48-50.

1998 Mariga, J.*, Hanson, R., Martin, M., Singletary, S.*, and Bowring, S., Timing of polyphase ductile deformation at deep to mid-crustal levels in the Neoproterozoic Zambezi belt, NE Zimbabwe: Geological Society of America Abstracts with Programs, v. 30, no. 7, p. A292.

1998 Singletary, S.*, Martin, M., Hanson, R., Bowring, S., Key, R., Majaule, T., Mapeo, R., Ramokate, L., and Direng, B., Distribution of Proterozoic orogenic provinces beneath the Kalahari desert in Botswana: Geological Society of America Abstracts with Programs, v. 30, no. 7, p. A98.

1997 Hanson, R., Girty, G.H., Girty, M.S., Harwood, D.S., and Schweickert, R.A., Jurassic arc tectonics in the Northern Sierra terrane, California: Geological Society of America Abstracts with Programs, v. 29, n. 6, p. A-201.

1997 Hanson, R., Vinyu, M., Jelsma, H., Martin, M., Bowring, S., Krol, M., and Hodges, K., Geochronological constraints on the tectonic evolution of the 870-530 Ma Zambezi orogenic belt, northeastern Zimbabwe: Geological Society of America Abstracts with Programs, v. 29, n. 6, p. A-468.

1997 Treloar, P.J., Evans, J., Munyanyiwa, H., and Hanson, R., Are all post-Archaean metamorphic events in Zimbabwe a function of intraplate magmatism?: Abstracts, 17th Colloquium on African Geology and Conference on Intraplate Magmatism and Tectonics of Southern Africa (Geological Society of Zimbabwe, Harare, Zimbabwe, September 8-12, 1997), p. 51-52.

1997 Vinyu, M., Martin, M., Bowring, S., Hanson, R., Jelsma, H., and Dirks, P., Tectonothermal evolution of the polymetamorphic Zambezi belt in NE Zimbabwe: constraints from U-Pb single-grain zircon data: Abstracts, 17th Colloquium on African Geology and Conference on Intraplate Magmatism and Tectonics of Southern Africa (Geological Society of Zimbabwe, Harare, Zimbabwe, September 8-12, 1997), p. 52.

1996 Munyanyiwa, H., Blenkinsop, T.G., Hanson, R.E., and Treloar, P.J., Geochemistry of amphibolites and quartzofeldspathic gneisses in the Pan-African Zambezi belt, NW Zimbabwe: bimodal magmatism in a continental rift setting: Geological Society of America Abstracts with Programs, v. 28, n. 7, p. A-230.

1995 DeGroat, P.J.*, Donovan, R.N., Hanson, R.E., and Weaver, B.L., Petrology and geochemistry of Cambrian diabase and gabbro in the Blue Creek Canyon area, Wichita Mountains, Oklahoma: Geological Society of America Abstracts with Programs, v. 27, n. 3, p. 46.

1995 Grunow, A.M., Hanson, R.E., and Wilson, T.J., Were aspects of Pan-African deformation in Gondwana a result of Iapetus opening? Geological Society of America Abstracts with Programs, v. 27, n. 6, p. A-125-126.

1995 Hargrove, U.S.*, Hanson, R.E., Girty, G.H., and Harwood, D.S., Large-scale andesite-diorite peperite complex in subaqueous Jurassic arc-apron deposits, northern Sierra Nevada, California: Geological Society of America Abstracts with Programs, v. 27, n. 5, p. 24.

1995 Mielke, K.*, Hanson, R., Girty, G., Girty, M., and Schweickert, R.A., Paleovolcanology and regional stratigraphic significance of Jurassic and Cretaceous island-arc rocks in the Webber Peak Quadrangle, Northern Sierra terrane, California: Geological Society of America Abstracts with Programs, v. 27, n. 5, p. 64.

1995 Phillipson, S.E.*, Hanson, R.E., Girty, G.H., and Girty, M.S., Petrology, age, and structural relations of the composite Middle Jurassic Haypress Creek pluton, Northern Sierra terrane, California: Geological Society of America Abstracts with Programs, v. 27, n. 5, p. 71.

1995 Wilson, T.J., Grunow, A.M., and Hanson, R.E., Gondwana assembly: the view from southern Africa and Antarctica: Geological Society of America Abstracts with Programs, v. 27, n. 2, p. 97.

1994 Hanson, R.E., Girty, G.H., and Harwood, D.S., Middle Jurassic evolution of the Northern Sierra terrane: large-scale tilting, deformation, and syn- to post-tectonic plutonism in a rapidly evolving arc: Geological Society of America Abstracts with Programs, v. 26, n. 7, p. A385.

1994 Hanson, R.E., Bowring, S.A., Wardlaw, M.S., and Wilson, T.J., Intracontinental origin of the Pan-African Zambezi orogenic belt, Zambia, in relation to the regional Proterozoic tectonic framework of southern Africa: Abstracts, Conference on Proterozoic Crustal and Metallogenic Evolution (Geological Society and Geological Survey of Namibia, Windhoek, August 29-September 1, 1994), p. 24.

1994 Harwood, D.S., Girty, G.H., and Hanson, R.E., Prebatholithic normal and right-oblique movement on the Talbot Fault Zone, northern Sierra Nevada, California: Geological Society of America Abstracts with Programs, v. 26, n. 2, p. 57-58.

1994 Hill, C.A., Skinner, J.E., Matusiak, M.R., Girty, G.H., Hanson, R.E., Harwood, D.S., Johnson, D., and Knaack, C., Petrology and geochemistry of the Middle Jurassic Black Buttes quartz monzodiorite, Sierra Nevada, California: Geological Society of America Abstracts with Programs, v. 26, n. 2, p. 59.

1994 Kulow, M.J.*, Hanson, R.E., Girty, G.H., Girty, M.S., Harwood, D.S., and Schweickert, R.A., Early Cretaceous ductile deformation associated with pluton emplacement in the Northern Sierra terrane: Geological Society of America Abstracts with Programs, v. 26, n. 2, p. 64.

1994 Miller, C.A.*, Barton, M., and Hanson, R.E., Magmatism across the Lower Cretaceous arc/marginal basin transition on Peninsula Hardy, southernmost Chile: American Geophysical Union Transactions, v. 75, n. 16, p. 352.

1994 Skinner, J.E., Yoshinobu, A.S., Mongano, G.S., Pubentz, M.W., Schar, T.P., Girty, G.H., Girty, M.S., Hanson, R.E., Harwood, D.S., Johnson, D., and Knaack, C., Geochemistry, geochronology, and petrologic evolution of the Emigrant Gap composite pluton: Geological Society of America Abstracts with Programs, v. 26, n. 2, p. 92.

1993 Bigger, S.E.*, and Hanson, R.E., Devitrification of the Carlton Rhyolite in the Blue Creek Canyon area, Wichita Mountains, southwestern Oklahoma: Geological Society of America Abstracts with Programs, v. 25, n. 1, p. 3.

1993 Girty, G.H., Yoshinobu, A.S., Girty, M.S., Wracher, M.D., Bryan, K.A., Skinner, J.E., McNulty, B.A., Bracchi, K.A., Harwood, D.S., and Hanson, R.E., U-Pb zircon geochronology of the Emigrant Gap composite pluton, northern Sierra Nevada, California: implications for the Nevadan orogeny: American Association of Petroleum Geologists Bulletin: Abstracts for Pacific Section, Society of Economic Paleontologists and Mineralogists, Annual Meeting (Long Beach, California).

1993 Hanson, R.E., and Wilson, T.J., Pan-African collisional and intracontinental orogenic belts in southern Africa in relation to Neoproterozoic plate configurations: Geological Society of America Abstracts with Programs, v. 25, n. 1, p. 13.

1993 Hanson, R.E., Wilson, T.J., Wardlaw, M.S., and Bowring, S.A., The Pan-African Zambezi belt (south-central Africa) as a ductilely deformed aulacogen: structural and geochronological constraints: Geological Society of America Abstracts with Programs, v. 25, n. 6, p. A298.

1993 Templeton, J.H.*, Hanson, R.E., and Harwood, D.S., Geochemical tectonomagmatic discrimination of metamorphosed Middle Jurassic volcanic rocks, northern Sierra Nevada, California: Geological Society of America Abstracts with Programs, v. 25, n. 5, p. 154.

1992 Hanson, R.E., and Elliot, D.H., Late Triassic - Early Jurassic rift-related explosive volcanism in the central Transantarctic Mountains: Geological Society of America Abstracts with Programs, v. 24, n. 7, p. A193.

1992 Wilson, T.J., Hanson, R.E., and Wardlaw, M.S., Meso- and Neoproterozoic tectonics of southern Africa in relation to Gondwana assembly: American Geophysical Union Transactions, v. 73, n. 14, p. 369.

1991 Breyer, J.A., Busbey, A.B., and Hanson, R.E., One-billion-year-old grazing traces from the Allamoore Formation, Trans-Pecos, Texas: Geological Society of America Abstracts with Programs, v. 23, n. 5, p. A455.

1991 Hanson, R.E., Wardlaw, M.S., Wilson, T.J., and Mwale, G., U-Pb zircon ages from the Hook granite massif, Zambia: implications for Pan-African tectonics in south-central Africa: Geological Society of America Abstracts with Programs, v. 23, n. 5, p. A97-98.

1991 Hanson, R.E., Wilson, T.J., and Wardlaw, M.S., Late Proterozoic shear displacements in Gondwana: kinematics of the Pan-African Zambezi belt, Zambia: Abstracts, Eighth International Gondwana Symposium (Hobart, Tasmania, 24-28 June, 1991), p. 39-40.

1991 Templeton, J.H.*, and Hanson, R.E., Volcanology and stratigraphic evolution of a Jurassic island-arc sequence, northern Sierra Nevada, California: Geological Society of America Abstracts with Programs, v. 23, n. 2, p. 103.

1991 Templeton, J.H.*, and Hanson, R.E., Extensive magma/wet-sediment interaction in a Jurassic island-arc setting, northern Sierra Nevada, California: Geological Society of America Abstracts with Programs, v. 23, n. 5, p. A395.

1990 Hanson, R.E., Wilson, T.J., Wardlaw, M.S., and Onstott, T.C., Nature and timing of depositional and orogenic events in the Late Proterozoic (Pan-African) Zambezi belt, Zambia: Geological Society of America Abstracts with Programs, v. 22, n. 7, p. A264.

1990 Miller, C.A.*, Barton, M., Hanson, R.E., and Fleming, T.H., Mineral, rare earth, and trace element geochemistry of rocks from a Mesozoic volcanic arc - marginal basin transition, Peninsula Hardy, southernmost Chile: American Geophysical Union Transactions (Baltimore, April, 1990).

1989 Elliot, R.J., Wilson, T.J., and Hanson, R.E., Late Proterozoic syntectonic plutonism in the Zambezi belt, Zambia: Geological Society of America Abstracts with Programs, v. 21, n. 6, p. A69.

1989 Hanson, R.E., Paleovolcanology of Jurassic extension-related submarine rhyolites on Staten Island, southernmost Argentina: Geological Society of America Abstracts with Programs, v. 21, n. 6, p. A14.

1989 Hanson, R.E., Donovan, R.N., and Wilson, T.J., The Late Proterozoic Zambezi belt in southern Africa: a model for the deeper levels of the Southern Oklahoma aulacogen: Geological Society of America Abstracts with Programs, v. 21, n. 1, p. 13.

1989 Hanson, R.E., Miller, C.A.*, Barton, M., and Mukasa, S.B., Cretaceous island-arc/marginal basin transition in the southern Andes, Peninsula Hardy, southernmost Chile: Geological Society of America Abstracts with Programs, v. 21, n. 6, p. A13-14.

1988 Hanson, R.E., Rhyolitic submarine volcanism in a Jurassic proto-marginal basin, southern Andes: Geological Society of America Abstracts with Programs, v. 20, n. 7, p. A5.

1988 Hanson, R.E., and Wilson, T.J., Tectonics of the Pan-African Zambezi belt, Zambia: Geological Society of America Abstracts with Programs, v. 20, n. 5, p. 346.

1988 Hanson, R.E., Wilson, T.J., Wardlaw, M.S., Brueckner, H.K., and Onstott, T.C., Geochronology of the Middle Proterozoic Choma-Kalomo block, southern Zambia: evidence for cross-cutting mobile belts in south-central Africa: Geological Society of America Abstracts with Programs, v. 20, n. 7, p. A204.

1988 Wilson, T.J., and Hanson, R.E., "Tectonic conglomerates" developed from synkinematic pegmatites during ductile shearing, Zambezi belt, Zambia: Geological Society of America Abstracts with Programs, v. 20, n. 5, p. 395.

1987 Hanson, R.E., Facies of a Jurassic submarine rhyolitic volcano-tectonic rift zone, southern Andes, Chile: Geological Society of America Abstracts with Programs, v. 19, n. 7, p. 693.

1987 Wilson, T.J., and Hanson, R.E., Structural evolution of the southern margin of the Pan-African Zambezi mobile belt: Geological Society of America Abstracts with Programs, v. 19, n. 4, p. 252.

1987 Wilson, T.J., Hanson, R.E., and Grunow, A.M., Structural history of subduction complex rocks, Diego Ramirez Islands, southernmost Chile: Geological Society of America Abstracts with Programs, v. 19, n. 7, p. 893.

1987 Wilson, T.J., Grunow, A.M., Hanson, R.E., and Schmitt, K.R., Subduction complex rocks on Diego Ramirez Islands, Chile: Abstracts, 5th International Symposium on Antarctic Earth Sciences (Cambridge, England, 24-28 August, 1987).

1986 Hanson, R.E., and Wilson, T.J., Large-scale rhyolite peperites in a Jurassic submarine volcano-tectonic rift setting, southern Andes, Chile: Geological Society of America Abstracts with Programs, v. 18, n. 6, p. 628.

1985 Brueckner, H.K., Hardcastle, K.C., Hanson, R.E., and Wilson, T.J., A Rb-Sr age from the Choma-Kalomo batholith, evidence for the Irumide belt in southern Zambia, Africa: Geological Society of America Abstracts with Programs, v. 17, n. 7, p. 533.

1985 Hanson, R., Wilson, T., and Onstott, T.C., Preliminary paleomagnetic results from the Bangweulu block, northern Zambia: American Geophysical Union Transactions, v. 66, n. 18, p. 254.

1985 Hanson, R.E., Wilson, T.J., and Wardlaw, M.S., Structure, age, and regional significance of syntectonic augen gneisses in the Pan-African Zambezi belt, southern Zambia: Geological Society of America Abstracts with Programs, v. 17, n. 7, p. 603.

1985 Wilson, T.J., Hanson, R.E., and Brueckner, H.K., Transposition, ductile shearing and noncylindrical folding of remobilized gneisses along the junction between two Proterozoic mobile belts in southern Zambia: Geological Society of America Abstracts with Programs, v. 17, n. 7, p. 752.

1985 Wilson, T.J., Hanson, R.E., Brueckner, H.K., and Wardlaw, M., New structural and geochronological data from the Zambezi belt, southern Zambia: Abstracts for Workshop on the Geology and Mineral Resources of Zambia and Neighboring Countries (Geological Society of Zambia, Lusaka, 29-30 March, 1985).

1983 Hanson, R.E., Schweickert, R.A., and Brueckner, H.K., The Bowman Lake batholith: a probable Upper Devonian composite pluton in the northern Sierra Nevada, California: Geological Society of America Abstracts with Programs, v. 15, n. 5, p. 323.

1983 Schweickert, R.A., Bogen, N.L, Girty, G.H., Hanson, R.E., and Merguerian, C., Timing and structural expression of the Nevadan orogeny, Sierra Nevada, California: Geological Society of America Abstracts with Programs, v. 15, n. 5, p. 293.

1982 Hanson, R.E., An intrusive andesitic hyaloclastite complex in an Upper Devonian island-arc sequence, Sierra Buttes Formation, northern California: Geological Society of America Abstracts with Programs, v. 14, n. 4, p. 170.

1982 Hanson, R.E., Fluid behavior of submarine rhyolites: Geological Society of America Abstracts with Programs, v. 14, n. 7, p. 507.

1982 Hanson, R.E., and Schweickert, R.A., Stratigraphy of the upper Paleozoic arc sequence of the northern Sierra Nevada: new data and implications for submarine facies variations in island arcs: Geological Society of America Abstracts with Programs, v. 14, n. 4, p. 170.

1981 Hanson, R.E., Depositional mechanisms of coarse submarine volcanogenic sediments: an example from the Upper Devonian Sierra Buttes Formation, northern Sierra Nevada, California: Geological Society of America Abstracts with Programs, v. 13, n. 7, p. 467-468.

1981 Hanson, R.E., Schweickert, R.A., and Wilson, T.J., Ignimbrite dikes in the Jurassic section of the northern Sierra Nevada, California: Geological Society of America Abstracts with Programs, v. 13, n. 2, p. 59.

1980 Bogen, N.L., Girty, G.H., Hanson, R.E., Merguerian, C., and Schweickert, R.A., Contrasting styles of deformation during the Nevadan orogeny, Sierra Nevada, California: Geological Society of America Abstracts with Programs, v. 12, n. 3, p. 98.

1980 Girty, G.H., Schweickert, R.A., and Hanson, R.E., Structural fabrics of the Shoo Fly Complex near Bowman Lake, northern Sierra Nevada, California: Geological Society of America Abstracts with Programs, v. 12, n. 3, p. 107.

1980 Hanson, R.E., Schweickert, R.A., and Girty, G.H., Peperites and hydroexplosion breccias in the Sierra Buttes Formation, northern Sierra Nevada, and their stratigraphic implications: Geological Society of America Abstracts with Programs, v. 12, n. 3, p. 109.

1977 Al-Shaieb, Z., and Hanson, R.E., Geochemistry and petrology of uranium-bearing pegmatite dikes, Wichita Mountains, Oklahoma: Geological Society of America Abstracts with Programs, v. 9, n. 7, p. 877.

1976 Al-Shaieb, Z., Hanson, R.E., and Adams, S.R., Geochemistry of Wichita Mountains igneous rocks as related to copper and uranium mineralizations in southern Oklahoma: Geological Society of America Abstracts with Programs, v. 8, n. 6, p. 752.

Theses Supervised:

M.S. Theses:

In progress        DeBone, K., Newly discovered Paleocene phreatomagmatic vent complex in Big Bend National Park, Texas: Texas Christian University.

In progress        Lehman, K.M., Geochemical constraints on evolving 1.36-1.1 Ga intraplate and volcanic arc regimes in the Konkiep Terrane, Namaqua-Natal orogenic belt, SW Namibia: Texas Christian University.

In progress        Ohrmundt, S.C., Complex shallow-level andesitic magma plumbing systems and magma/sediment interaction in a Mesoproterozoic volcanic arc setting, SW Nambia: Texas Christian University.

2016 Finegan, S.A., Physical volcanology and geochemistry of the Carlton Rhyolite (Cambrian) in the Fort Sill area, Wichita Mountains, southwestern Oklahoma: Texas Christian University.

2015 Boro, J.R., Volcanic lithofacies and geochemistry of Cambrian rift-related rhyolites in the West Timbered Hills, Arbuckle Mountains, southern Oklahoma: Texas Christian University.

2015 Harmon, K.L., Structural evolution and tectonic significance of the Jurassic (?) Talbot fault zone in the Northern Sierra terrane, California: Texas Christian University (co-supervised with Helge Alsleben).

2015 Toews, C.E., Cambrian phreatomagmatic igneous breccia and associated bimodal hypabyssal intrusions in the West Timbered Hills, Arbuckle Mountains, southern Oklahoma: Texas Christian University.

2014 Hill, J.A., Complex Eocene-Oligocene hypabyssal intrusive systems associated with basaltic phreatomagmatic vents in the area east of Peña Mountain, Big Bend National Park, West Texas: Texas Christian University.

2012 Eschberger, A.M., Volcanological and geochemical studies of Cambrian rift-related igneous rocks in the western Arbuckle Mountains, southern Oklahoma: Texas Christian University.

2012 Roberts, J.M., Petrology, geochemistry, and geochronology of volcanic clasts contained in Ordovician strata in the Marathon fold-thrust belt, West Texas: Texas Christian University.

2008 Bartholomew, L.T., Paleomagnetism of Neoproterozoic intraplate igneous rocks in the southwest Kalahari craton, Namibia and South Africa: Texas Christian University.

2006 Befus, K.S., Late Cretaceous and Eocene phreatomagmatic volcanism and magma-sediment interaction in the Big Bend area of West Texas: Texas Christian University.

2004 Seidel, E.K., Paleomagnetic and geochronological study of parts of the 1.1 Ga Umkondo igneous province in South Africa: Texas Christian University.

2003 Berkebile, M.S., Geologic and paleomagnetic studies of a Pliocene volcanic debris-avalanche deposit in the northern Sierra Nevada, California: Texas Christian University.

2002 Philips, C.M., Paleovolcanology of the A-type Carlton Rhyolite, Blue Creek Canyon area, Wichita Mountains, southern Oklahoma: Texas Christian University.

2001 Pancake, J.A., Geochronological and paleomagnetic studies of Mesoproterozoic mafic igneous rocks in Botswana: Texas Christian University.

1999 Hargrove, U.S., Geochronology, structure, and metamorphism of part of the Pan-African Zambezi orogenic belt, Mt. Darwin area, northeast Zimbabwe: Texas Christian University.

1999 Mariga, J., Structural and geochronological evolution of deep-crustal granulites, supracrustal rocks, and deformed plutons in the Zambezi orogenic belt, Rusambo Mission area, northeastern Zimbabwe: Texas Christian University.

1999 Singletary, S.J., Geochronology and regional tectonic significance of isolated Proterozoic basement outcrops and drill cores in the Kalahari Desert, Botswana: Texas Christian University.

1999 Whittington, A.L., Remote-sensing study of structural relations between the Pan-African Zambezi and Mozambique belts in northeastern Zimbabwe and adjacent parts of Mozambique: Texas Christian University.

1996 Kulow, M.J., Geology, petrology, age, and intrusive relations of Cretaceous plutons in the Donner Lake - Cisco Grove area, northern Sierra Nevada, California: Texas Christian University.

1996 Mielke, K.L., Paleovolcanology, petrology, stratigraphy, and structure of Jurassic and Cretaceous island-arc rocks in the Webber Peak and Meadow Lake areas, Nevada and Sierra Counties, Northern Sierra terrane, California: Texas Christian University.

1995 Phillipson, S.E., Petrology, age, and structural relations of the composite Middle Jurassic Haypress Creek pluton, Northern Sierra terrane, California: Texas Christian University.

1991 Templeton, J.H., Submarine volcanism and volcaniclastic sedimentation in a Jurassic island-arc environment, northern Sierra Nevada, California: Texas Christian University.

1990 Miller, C.A., Field relations and mineral, rare earth, and trace element geochemistry of rocks from a Mesozoic volcanic-arc/marginal-basin transition, Peninsula Hardy, southernmost Chile: Ohio State University.

1985 Munyanyiwa, H., The geochemistry and metamorphism of calc-silicate rocks, marbles, and amphibolites in a portion of the Zambezi belt, southern Zambia: University of Zambia.

Undergraduate Research Projects:

2016 Baylor, D., Non-explosive and explosive magma/wet-sediment interaction associated with selected Eocene hypabyssal basaltic intrusions in Big Bend National Park, west Texas (senior research project, presented as a poster at the 2016 GSA South-Central section meeting).

2015 Bucholz, J.F., An unusual Eocene basaltic phreatomagmatic fissure vent in Big Bend National Park, west Texas (senior research project, presented as a poster at the 2015 GSA South-Central section meeting).

2011 Frazier, S.J., Cambrian volcanic stratigraphy and rhyolite peperite in the Bally Mountain area, SW Oklahoma: Texas Christian University (senior research project, presented as a poster at the 2012 GSA South-Central section meeting).

2010 Roberts, J.M., Petrography and geochemistry of volcanic clasts in submarine Ordovician mass-flow deposits in the Marathon fold-thrust belt, West Texas: Texas Christian University (senior research project, presented as a poster at the 2010 annual GSA meeting).

2009 Winkler, C., A newly discovered Eocene(?) basaltic phreatomagmatic vent complex in Big Bend National Park, Trans-Pecos Texas: Texas Christian University (senior research project, presented as a poster at the GSA South-Central Section meeting).

2005 Burkholder, B., Paleovolcanology of the Cartlon Rhyolite, Zodletone Mountain, southern Oklahoma: Texas Christian University (senior thesis).

2002 Cross, J., Interflow volcaniclastic deposits in the Cambrian Carlton Rhyolite on Bally Mountain in the Slick Hills of southwestern Oklahoma: Texas Christian University (senior thesis).

1995 Hargrove, U.S., Geology of the Huntley Mill Lake sill complex: a multiphase peperitic sill intruded into wet sediments, Jurassic, northern Sierra Nevada, California: Texas Christian University (senior thesis).

1994 DeGroat, P.J., Cambrian basic intrusive rocks in the Blue Creek Canyon area, Wichita Mountains, southwestern Oklahoma: Texas Christian University (senior honors thesis).

1994 Kulow, M.J., The Big Bend shear zone: Early Cretaceous ductile deformation associated with pluton emplacement in the Northern Sierra terrane, California: Texas Christian University (senior thesis).

1991 Bigger, S.E., Devitrification of the Carlton Rhyolite in the Blue Creek Canyon area, Wichita Mountains, southern Oklahoma: Texas Christian University (senior thesis).

1988 Emslie, M.A., Petrography and trace-element geochemistry of metabasalts on Diego Ramirez Islands, southern Chile: Ohio State University (senior thesis).