Cretaceous rhyolite peperite, northern Sierra Nevada. Rhyolite tongues intrude dark-colored tuff-breccia. Kristin Mielke for scale. See Mielke et al. (1995) and Mielke (1996).	Jurassic andesitic hypabyssal intrusive complex, northern Sierra Nevada Andesitic intrusive complex is dark in color and is truncated by lighter colored Cretaceous granitic rocks in middle distance. Peperite within the complex is visible to left. See Hanson and Hargrove (1999).

(Published papers or abstracts of presentations at professional meetings. TCU student authors are bold).

2010 Dietz, 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 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

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 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.

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 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 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., 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.

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.

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 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, v. 107, p. 233-254.

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).

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.

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 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 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, 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 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 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 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 Hanson, R.E., Hargrove, U.S., Martin, M.A., 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.A., 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., 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, Sigma Gamma Epsilon), v. 74, p. 95-102.

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.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 (Journal of Earth Sciences, Sigma Gamma Epsilon), v. 74, p. 69-76.

1998 Kulow, M., Hanson, R., Girty, G., Girty, M., 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 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 Mielke, K.L., 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 (Journal of Earth Sciences, Sigma Gamma Epsilon), 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 (Journal of Earth Sciences, Sigma Gamma Epsilon), v. 74, p. 87-94.

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 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.

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.

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 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 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.

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.

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 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: Geological Society of America, Field Trip Guidebook for 1993 Cordilleran/Rocky Mountain Sections Joint Meeting, p. 97-128.

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 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 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.