Session: Stratigraphic, Structural, Geomorphic, and Tectonic Evolution of the Lake Mead Region, Southwestern United States, from the Oligocene to the Present (Posters) (2010 GSA Denver Annual Meeting (31 October

T142. Stratigraphic, Structural, Geomorphic, and Tectonic Evolution of the Lake Mead Region, Southwestern United States, from the Oligocene to the Present (Posters)

GSA Quaternary Geology and Geomorphology Division

Authors will be present from 9 to 11 AM, and 4:30 to 5:30 PM.

Paper #

Booth #

262

SEISMO-LINEAMENT ANALYSIS OF THE KANAB-FREDONIA AREA OF THE SOUTHERN COLORADO PLATEAU

LANCASTER, Daniel S., Department of Geology, Baylor University, One Bear Place #97354, Waco, TX 76798, CRONIN, Vincent S., Department of Geology, Baylor University, One Bear Place #97354, Waco, TX 76798-7354 and BRUMBAUGH, David S., Department of Geology, Northern Arizona University, Frier Hall, Knoles Drive, Flagstaff, AZ 86011, dan_lancaster@baylor.edu, dan_lancaster@baylor.edu

263

GRAVITY DATA INCONSISTENT WITH AN ASYMMETRICAL BASIN ABOVE THE CASTLE CLIFF DETACHMENT, UTAH AND NEVADA

ALMEIDA, Rafael, COCHRAN, James R., CHRISTIE-BLICK, Nicholas, FOSTER, Anna E. and LLOYD, Alexander S., Department of Earth and Environmental Sciences and Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, rafael@ldeo.columbia.edu, rafael@ldeo.columbia.edu

264

STRATIGRAPHIC ANALYSIS OF THE LOWER HORSE SPRING FORMATION IN THE FRENCHMAN MOUNTAIN BLOCK, LAKE MEAD DOMAIN: INSIGHTS INTO PALEOGEOGRAPHY AND TIES TO THE GOLD BUTTE BLOCK

SITTON, Mark E., Devon Energy, 20 North Broadway, Oklahoma City, OK 73102, UMHOEFER, Paul J., School of Earth Sciences & Environmental Sustainability, Northern Arizona University, 625 Knoles Drive, Box 4099, Flagstaff, AZ 86011 and HICKSON, Thomas, Geology, Univ of St. Thomas, 2115 Summit Ave, St. Paul, MN 55105, paul.umhoefer@nau.edu, paul.umhoefer@nau.edu

265

MIOCENE CLOCKWISE ROTATIONS AND LEFT-LATERAL FAULTING RELATED TO THE LAS VEGAS VALLEY SHEAR ZONE, FRENCHMAN MOUNTAIN BLOCK, LAKE MEAD DOMAIN, NEVADA

WAGNER, Rachelle¹, UMHOEFER, Paul J.², DUEBENDORFER, Ernest¹ and BEARD, L. Sue³, (1)School of Earth Sciences & Environmental Sustainability, Northern Arizona University, Geology - 4099, Building 12, Knoles Drive, Flagstaff, AZ 86011, (2)School of Earth Sciences & Environmental Sustainability, Northern Arizona University, 625 Knoles Drive, Box 4099, Flagstaff, AZ 86011, (3)U.S. Geological Survey, 2255 N Gemini Dr, Flagstaff, AZ 86001-1637, rrw38@nau.edu, rrw38@nau.edu

266

RECOGNITION OF A LATE PLEISTOCENE BRAIDED FLUVIAL TUFA SYSTEM ASSOCIATED WITH GROUNDWATER DISCHARGE DEPOSITS, UPPER LAS VEGAS WASH, NEVADA

MANKER, Craig R. and SPRINGER, Kathleen, Division of Geological Sciences, San Bernardino County Museum, 2024 Orange Tree Lane, Redlands, CA 92374, cmanker@sbcm.sbcounty.gov, cmanker@sbcm.sbcounty.gov

267

MULTI-COMPONENT MAGMA MINGLING REVEALED IN A RHYOLITE-DACITE-ANDESITE COULEE, SOUTHERN HIGHLAND RANGE (SOUTHERN NEVADA)

KELLY, Evan A.¹, MILLER, Calvin F.², GUALDA, Guilherme A.R.³, COLOMBINI, Lindy L.S.², PADILLA, Abraham De Jesus² and CRIBB, J. Warner⁴, (1)Earth and Environmental Sciences, University of Kentucky, Lexington, KY 40508, (2)Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37235, (3)Dept. of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37235, (4)Geosciences, Middle Tennessee State Univ, PO Box 9, Murfreesboro, TN 37132, evan.a.kelly@uky.edu, evan.a.kelly@uky.edu

268

DEATH THROES OF A SILICIC SYSTEM: FINAL RE-ACTIVATION OF GRANITIC CRYSTAL MUSH AND TRANSITION TO ANDESITIC VOLCANISM, HIGHLAND RANGE, SOUTHERN NEVADA

PADILLA, Abraham De Jesus¹, MILLER, Calvin F.¹, GUALDA, Guilherme A.R.², COLOMBINI, Lindy L.S.¹, KELLY, Evan A.³ and CRIBB, J. Warner⁴, (1)Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37235, (2)Dept. of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37235, (3)Earth and Environmental Sciences, University of Kentucky, Lexington, KY 40508, (4)Geosciences, Middle Tennessee State Univ, PO Box 9, Murfreesboro, TN 37132, a.padilla@vanderbilt.edu, a.padilla@vanderbilt.edu

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