Session: New Perspectives on Chert, Its Origin, Diagenesis, and Economic Significance (2002 Denver Annual Meeting (October 27-30, 2002))

Session No. 243

Wednesday, 30 October 2002: 1:30 PM-5:30 PM

T107. New Perspectives on Chert, Its Origin, Diagenesis, and Economic Significance

GSA Sedimentary Geology Division; SEPM—Society for Sedimentary Geology

James P. Rogers and Mark W. Longman, Advocates

Paper #

Start Time

1:30 PM

MODERN SILICEOUS HOT SPRING PRECIPITATES: POSSIBLE ANALOGS FOR ANCIENT CHERTS

GUIDRY, Sean Andre and CHAFETZ, Henry, Department of Geosciences, Univ of Houston, Houston, TX 77204-5007, Sean.A.Guidry@exxonmobil.com, Sean.A.Guidry@exxonmobil.com

1:45 PM

THE POTENTIAL ROLE OF NANNOBACTERIA (DWARF FORMS, 30-100NM) IN THE PRECIPITATION OF CHERT AND ITS PRECURSORS

FOLK, Robert L., Department of Geological Sciences, Univ of Texas, Austin, Austin, TX 78712, rlfolk@mail.utexas.edu, rlfolk@mail.utexas.edu

2:00 PM

SEM STUDIES OF PETRIFIED WOOD AND THE POSSIBLE ROLE OF NANNOBACTERIA IN THE SILICIFICATION OF WOOD

RODGERS, Jeri C., Department of Geological Sciences, Univ of Texas, Austin, Austin, TX 78712, JeriCR55@aol.com, JeriCR55@aol.com

2:15 PM

PARASEQUENCE-SCALE DEPOSITIONAL CYCLES AND SILICA DIAGENESIS CONTROL RESERVOIR PROPERTIES FOR MIOCENE BIOSILICEOUS RESERVOIRS OF THE ELK HILLS FIELD, CALIFORNIA

SCHWALBACH, Jon R. and BENMORE, William C., Occidental of Elk Hills, Inc, 28590 Highway 119, P.O. Box 1001, Tupman, CA 93276-1001, Jon_Schwalbach@oxy.com, Jon_Schwalbach@oxy.com

2:30 PM

SHALLOW SHELF BIOSILICEOUS SEDIMENTATION: A TERRESTRIAL ARIDITY RECORD?

GAMMON, Paul R., Geology & Geophysics, Univ of Adelaide, Adelaide, Australia and JAMES, Noel P., Geological Sciences, Queen's Univ, Kingston, Ontario, ON K7L 3N6, Canada, paul.gammon@adelaide.edu.au, paul.gammon@adelaide.edu.au

2:45 PM

GROWTH AND DEMISE OF PERMIAN BIOGENIC CHERT ALONG NORTHWEST PANGEA: EVIDENCE FOR END-PERMIAN COLLAPSE OF THERMOHALINE CIRCULATION

BEAUCHAMP, Benoit, Geol Survey of Canada, 3303, 33rd ST NW, Calgary, AB T2L 2A7, Canada and BAUD, Aymon, Musée cantonal de géologie, CH-1015 Lausanne, Lausanne, Switzerland, bbeaucha@nrcan.gc.ca, bbeaucha@nrcan.gc.ca

3:00 PM

A GLASS RAMP: LATE PERMIAN SPICULITES, SVERDRUP BASIN, ARCTIC CANADA

GATES, Laura M., Geological Sciences, Queen's Univ, Kingston, ON K7L 3N6, Canada, JAMES, Noel P., Geological Sciences, Queen's Univ, Kingston, Ontario, ON K7L 3N6, Canada and BEAUCHAMP, Benoit, Geol Survey of Canada, 3303, 33rd ST NW, Calgary, AB T2L 2A7, Canada, gates@students.geol.queensu.ca, gates@students.geol.queensu.ca

3:15 PM

COMPARISON OF MIDDLE MISSISSIPPIAN OSAGIAN SHELF AND SHELF MARGIN CHERT DEPOSITS IN CENTRAL KANSAS

WATNEY, W. Lynn, FRANSEEN, Evan K. and BYRNES, Alan P., Kansas Geological Survey, The Univ of Kansas, 1930 Constant Avenue, Lawrence, KS 66047, lwatney@kgs.ukans.edu, lwatney@kgs.ukans.edu

3:30 PM

DEPOSITIONAL SETTING, LITHOLOGIC CHARACTER, AND ORIGIN OF CHERT IN THE BOONE FORMATION (LOWER MISSISSIPPIAN), NORTHERN ARKANSAS

MANGER, Walter L., Department of Geosciences, University of Arkansas, 113 Ozark Hall, Fayetteville, AR 72701, FALLACARO, Alicia, Department of Geological Sciences, Univ of Nevada - Reno, Mackay School of Mines, Reno, NV 89557-0138 and DUNBAR, Nelia W., Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology, 801 Leroy, Socorro, NM 87801, wmanger@mail.uark.edu, wmanger@mail.uark.edu

3:45 PM

WIDESPREAD LATE ORDOVICIAN SILICIFICATION EVENT ON LAURENTIA: A PROXY FOR THE DURATION OF GONDWANA GLACIATION?

POPE, Michael C., Geology, Washington State Univ, P.O. Box 642812, Pullman, WA 99163, mcpope@wsu.edu, mcpope@wsu.edu

4:00 PM

GEOCHEMICALLY IDENTIFYING PRIMARY DEPOSITIONAL CHERT FROM EARLY AND LATE DIAGENETIC CHERT IN THE LATE ORDOVICIAN MONTOYA GROUP

STEFFEN, Jessica B, Geology, Washington State University, Pullman, WA 99164 and POPE, Michael C., Geology, Washington State Univ, P.O. Box 642812, Pullman, WA 99163, jbsteffen@eudoramail.com, jbsteffen@eudoramail.com

4:15 PM

CHANGING ENVIRONMENTS OF CHERT ACCUMULATION THROUGH THE ORDOVICIAN

TOMESCU, Iulia and KIDDER, David L., Geological Sciences, Ohio Univ, Athens, OH 45701-2979, iuliatomescu@hotmail.com, iuliatomescu@hotmail.com

4:30 PM

ARE CONTINENTAL MARGIN CHERTS A MOVING TARGET?

KIDDER, David L., Geological Sciences, Ohio Univ, Athens, OH 45701-2979, kidder@ohiou.edu, kidder@ohiou.edu

4:45 PM

FRACTAL ANALYSIS AND ORIGIN OF A CHERT MEGABRECCIA IN THE RICHAT DOME, MAURITANIA, AFRICA

MATTON, Guillaume, Earth and atmospheric science, Université du Québec à Montréal, CP 8888 Centre Ville, Montreal, QC H3C 3P8, Canada, JEBRAK, Michel, Univ Quebec - Montreal, CP 8888 - Succ Centre Ville, Montreal, QC H3C 3P8, Canada and MAHFOUDH, Ahmedou ould, Geology, Nouakchott Univ, BP 5026, Nouakchott, Mauritania, g_matton@hotmail.com, g_matton@hotmail.com

5:00 PM

CHERT AND THE PROTEROZOIC OCEANIC SILICA CYCLE

MALIVA, Robert G., Camp Dresser & McKee, Inc, 8140 College Parkway, Suite 202, Fort Myers, FL 33919, SIMONSON, Bruce M., Geology Dept, Oberlin College, Oberlin, OH 44074 and KNOLL, Andrew H., Botanical Museum, Harvard Univ, 26 Oxford St, Cambridge, MA 02138, malivarg@cdm.com, malivarg@cdm.com

5:15 PM

CHERT PROBLEMS: BURDENS OF A CENTURY OF NEGLECT

ROGERS, James P., Consultant, 7922 South Buchanan Way, Aurora, CO 80016 and LONGMAN, Mark W., 701 Harlan St Apt E69, Lakewood, CO 80214-2361, jamesprogers@inetmail.att.net, jamesprogers@inetmail.att.net

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