Session: Geologic History and Processes of the Colorado River (2004 Denver Annual Meeting (November 7

Paper #

Start Time

1

1:30 PM

MIOCENE DRAINAGE HISTORY OF WESTERN GRAND CANYON, AZ

YOUNG, Richard A., Geological Sciences, State Univ of New York at Geneseo, Department of Geological Sciences, 1 College Circle, Geneseo, NY 14454, young@geneseo.edu, young@geneseo.edu

2

1:45 PM

HISTORY OF HEADWARD EROSION OF THE GRAND CANYON FROM A STUDY OF SPELEOTHEMS

POLYAK, Victor J.¹, HILL, Carol A.² and ASMEROM, Yemane¹, (1)Earth & Planetary Sciences, Univ of New Mexico, 200 Yale Blvd., Northrop Hall, Albuquerque, NM 87131, (2)Earth & Planetary Sciences, Univ of New Mexico, 221 Yale Blvd., Northrop Hall, Albuquerque, NM 87131, polyak@unm.edu, polyak@unm.edu

3

2:00 PM

ALLUVIAL AND LACUSTRINE STRATIGRAPHIC EVIDENCE FOR THE LATE NEOGENE INCEPTION AND EARLY EVOLUTION OF THE LOWER COLORADO RIVER IN THE VICNITY OF PYRAMID CANYON, NEVADA / ARIZONA

HOUSE, P. Kyle¹, PEARTHREE, Philip A.², FAULDS, James E.³ and BELL, John¹, (1)Nevada Bureau of Mines and Geology, Univ of Nevada, Reno, NV 89557-0088, (2)Arizona Geol Survey, 416 W. Congress #100, Tucson, AZ 85701, (3)Nevada Bureau of Mines and Geology, Univ of Nevada, Reno, NV 89557, khouse@unr.edu, khouse@unr.edu

4

2:20 PM

LATE PLEISTOCENE AGGRADATION AND INCISION OF THE LOWER COLORADO RIVER DOWNSTREAM OF THE GRAND CANYON

LUNDSTROM, Scott C., U.S. Geol Survey, Box 25046 Federal Center, MS/913, Denver, CO 80225, MAHAN, Shannon A., U.S. Geol Survey, Box 25046, MS 974, Denver Federal Center, Denver, CO 80225, PACES, James B., U.S. Geol Survey, Box 25046, MS963, Denver Federal Center, Denver, CO 80225-0046 and HUDSON, Mark R., U.S. Geol Survey, Box 25046, MS 980, Denver, CO 80225-0046, sclundst@usgs.gov, sclundst@usgs.gov

5

2:35 PM

THE LONGITUDINAL PROFILE OF THE COLORADO RIVER ON THE COLORADO PLATEAU: HOW DEEP IS ALLUVIUM BENEATH THE RIVER?

WEBB, R.H.¹, GRIFFITHS, P.G.¹, FLEMING, J.B.¹, CALLEGARY, J.B.¹, FENTON, C.R.¹ and HANKS, T.C.², (1)U.S. Geological Survey, 520 N. Park Avenue, Tucson, AZ 85719, (2)U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, rhwebb@usgs.gov, rhwebb@usgs.gov

6

2:55 PM

INCISION-RATE UNCERTAINTIES IN THE PRESENCE OF TRANSIENT AGGRADATION AND DEGRADATION OF DEBRIS FILL IN THE RIVER CHANNEL: THE COLORADO RIVER IN GRAND CANYON

HANKS, Thomas C., U.S. Geol Survey, 345 Middlefield Road, Menlo Park, CA 94025 and WEBB, Robert H., U.S. Geol Survey, 520 N. Park Avenue, Tucson, AZ 85719, thanks@usgs.gov, thanks@usgs.gov

7

3:10 PM

RELATING ROCK STRENGTH CONTROLS TO LARGE-SCALE VARIATIONS IN THE COLORADO RIVER’S PROFILE, GLEN AND GRAND CANYONS, UT AND AZ

MACKLEY, Rob D., Geology Department, Utah State Univ, Logan, UT 84322 and PEDERSON, Joel, Geology, utah state univeristy, 4505 old main hill, logan, UT 84322, mackley@cc.usu.edu, mackley@cc.usu.edu

8

3:25 PM

COLORADO RIVER SYSTEM OF THE SOUTHWESTERN U.S.: LONGITUDINAL PROFILES, DIFFERENTIAL INCISION, AND A HYPOTHESIS FOR QUATERNARY TECTONISM AT BOTH ENDS

KARLSTROM, Karl E., Dept. of Earth & Planetary Sciences, Univ of New Mexico, Northrop Hall, Albuquerque, NM 87131 and KIRBY, Eric, Department of Geosciences, Pennsylvania State Univ, 218 Deike Building, University Park, PA 16802, kek1@unm.edu, kek1@unm.edu

3:40 PM

Break

9

3:50 PM

HOLOCENE AGGRADATION OF THE COLORADO RIVER IN GRAND CANYON

DAVIS, Sidney W. and DAVIS, Marie E., P.O. Box 734, Georgetown, CA 95634, davis@innercite.com, davis@innercite.com

10

4:05 PM

MODERN CHANNEL CHANGE IN THE COLORADO RIVER SYSTEM: A MANDATE FOR RESTORATION?

SCHMIDT, John C., Aquatic, Watershed, and Earth Resources, Utah State Univ, Logan, UT 84322-5210, jack.schmidt@usu.edu, jack.schmidt@usu.edu

11

4:25 PM

SEDIMENT ACCUMULATIONS ON THE BOTTOM OF LAKE MEAD: A 70-YEAR RECORD OF DEPOSITIONAL PROCESSES

TWICHELL, David C., Jr¹, HANSON, Andrew D.², CROSS, VeeAnn A.¹ and RUDIN, Mark J.³, (1)US Geol Survey, 384 Woods Hole Rd, Woods Hole, MA 02543-1598, (2)Dept. of Geoscience, UNLV, 4505 So. Maryland Parkway, Box 454010, Las Vegas, NV 89119, (3)Dept. Health Physics, UNLV, 4505 So. Maryland Parkway, Box 453037, Las Vegas, NV 89119, dtwichell@usgs.gov, dtwichell@usgs.gov

12

4:45 PM

AT THE END OF THE RIVER: SEDIMENTARY AND BIOTIC EFFECTS OF RIVER MANAGEMENT ON THE COLORADO RIVER DELTA

FLESSA, Karl W.¹, CARRIQUIRY, J.D.², AVILA-SERRANO, G.E.³, TÉLLEZ-DUARTE, M.A.³, CINTRA-BUENROSTRO, C.E.¹, ROWELL, K.¹ and DETTMAN, D.L.¹, (1)Geosciences, Univ of Arizona, Tucson, AZ 85721, (2)Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Apdo Postal 453, Ensenada, B.C, C.P. 22800, Mexico, (3)Facultad de Ciencias Marinas, Universidad Autónoma de Baja California, Apdo Postal 453, Ensenada, B.C, C.P. 22800, Mexico, kflessa@geo.arizona.edu, kflessa@geo.arizona.edu

13

5:00 PM

PONCHO’S RADICAL RUNUP: UNUSUAL ANCIENT GRAND CANYON LANDSLIDE, COLORADO RIVER, ARIZONA

WARME, John E., Geology and Geological Engineering, Colorado School of Mines, Golden, CO 80401, jwarme@mines.edu, jwarme@mines.edu

14

5:15 PM

SPRING AND GAS CHEMISTRY OF TRAVERTINE-DEPOSITING SYSTEMS IN GRAND CANYON AND THE COLORADO PLATEAU: A PALEOHYDROLOGIC RECORD

CROSSEY, Laura J.¹, KARLSTROM, Karl E.², NEWELL, Dennis², FISCHER, Tobias³, HILTON, David⁴, PATCHETT, P. Jonathan⁵ and SHARP, Warren⁶, (1)Dept. of Earth & Planetary Sciences, Univ. of New Mexico, Northrop Hall, Albuquerque, NM 87131, (2)Dept. of Earth & Planetary Sciences, Univ of New Mexico, Northrop Hall, Albuquerque, NM 87131, (3)Earth & Planetary Sciences, Univ of New Mexico, Albuquerque, NM 87131, (4)Geosciences Research Div, Scripps Inst. of Oceanography, Univ. of Calif. San Diego, La Jolla, CA 92093, (5)Geosciences, University of Arizona, Tucson, AZ 85704, (6)Berkeley Geochronology Center, 2455 Ridge Rd, Berkeley, CA 94709, lcrossey@unm.edu, lcrossey@unm.edu

2004 Denver Annual Meeting (November 7–10, 2004)

T97. Geologic History and Processes of the Colorado River