Session No. T5 Thursday, June 28, 2001

10:00 AM-4:30 PM, Edinburgh International Conference Centre: Pentland
T5. The Snowball Earth Hypothesis: Theory and Observations
Paul Hoffman and Ian Fairchild, Presiding
Start Time
10:00 AM SNOWBALL EARTH: PROMISE AND PROBLEMS: HOFFMAN, Paul F., Earth & Planetary Sciences, Harvard Univ, 20 Oxford St, Cambridge, MA 02138, hoffman@eps.harvard.edu.
10:30 AM IS THE SNOWBALL A "NO-BALL"?: THE CASE AGAINST THE SNOWBALL EARTH HYPOTHESIS: YOUNG, Grant M., Univ Western Ontario, Biology & Geology Bldg Rm 128A, London, ON N6A 5B7 Canada, gyoung@julian.uwo.ca.
11:00 AM DEPRESSURIZATION OF HYDROTHERMAL VENTS DURING SNOWBALL EARTH: EFFECTS ON OCEAN CHEMISTRY: KUMP, Lee R., Dept. of Geosciences, Penn State, 535 Deike Bldg, University Park, PA 16802, lkump@psu.edu and SEYFRIED, William E. Jr, Dept. of Geology and Geophysics, Univ of Minnesota, 310 Pillsbury Drive SE, Minneapolis, MN 55455-0219,
11:30 AM THE SULFUR ISOTOPIC COMPOSITION OF TRACE SULFATE AND PYRITE ASSOCIATED WITH NEOPROTEROZOIC 'CAP CARBONATES' FROM NAMIBIA, SOUTH AUSTRALIA AND DEATH VALLEY, CA, USA: IMPLICATIONS FOR A SNOWBALL EARTH: HURTGEN, Matthew T., Penn State Astrobiology Research Center and Department of Geosciences, Pennsylvania State Univ, 801 Deike Bldg, University Park, PA 16802-2717, mhurtgen@geosc.psu.edu, ARTHUR, Michael A., Penn State Astrobiology Research Center and Department of Geosciences, Pennsylvania State Univ, 538 Deike Bldg, University Park, PA 16802, SUITS, Neil S., Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523, KAUFMAN, Alan J., Department of Geology, Univ of Maryland, College Park, MD 20742-4211, and PRAVE, Anthony, Geosciences, Univ of St Andrews, St Andrews, Fife, KY16 9AL, United Kingdom,
12:00 PM ON THE INITIATION OF A SNOWBALL EARTH: SCHRAG, Daniel P., Dept. Earth and Planetary Sciences, Harvard Univ, 20 Oxford St, Cambridge, MA 02138-2902, schrag@eps.harvard.edu.
12:30 PM Lunch
1:30 PM STRANGE WEATHER ON SNOWBALL EARTH: WALKER, James C.G., Geological Sciences, The University of Michigan, 3007 Geddes, Ann Arbor, MI 48104, jcgw@umich.edu.
2:00 PM MOLECULAR EVIDENCE FOR EARLY COLONIZATION OF LAND BY EUKARYOTES AND RELATION TO NEOPROTEROZOIC GLACIATIONS: HEDGES, S. Blair1, HECKMAN, Daniel S.1, GEISER, David M.2, EIDELL, Brooke R.1, and KARDOS, Natalie L.1, (1) Department of Biology and Astrobiology Research Center, Pennsylvania State Univ, 208 Mueller Lab, University Park, PA 16802, sbh1@psu.edu, (2) Department of Plant Pathology, Pennsylvania State Univ, 121 Buckhout Lab, University Park, PA
2:30 PM SNOWBALL EARTH: RESPONSE OF THE BIOSPHERE?: RUNNEGAR, Bruce, Univ California, Los Angeles, CA 90095-1567, runnegar@ucla.edu.
3:00 PM CARBON ISOTOPE EVIDENCE FOR ENHANCED SURFACE OXIDATION FOLLOWING A POTENTIAL NEOPROTEROZOIC ICE AGE IN DEATH VALLEY, CALIFORNIA: KAUFMAN, Alan J., Department of Geology, Univ of Maryland, College Park, MD 20742-4211, kaufman@geol.umd.edu and CORSETTI, Frank A., Department of Earth Sciences, Univ of Southern California, Los Angeles, CA 90089,
3:30 PM THE AFTERMATH OF NEOPROTEROZOIC GLACIATIONS: PRAVE, A. R1, FALLICK, A. E.2, HOFFMANN, K. H.3, BENN, D.1, and CONDON, D. J.1, (1) School of Geography & Geosciences, Univ of St Andrews, St Andrews, KY16 9AL, United Kingdom, ap13@st-and.ac.uk, (2) S.U.E.R.C, East Kilbride, Glasgow, G75 0QF, United Kingdom, (3) Geol Survey of Namibia, Windhoek, Namibia
4:00 PM THE SNOWBALL EARTH: MYTH OR METHANE?: KENNEDY, Martin J., Univ California - Riverside, 1432 Geology Bldg, Riverside, CA 92521-0423, martink@mail.ucr.edu, CHRISTIE-BLICK, Nicholas, Professor of Geological Sciences, Lamont-Doherty Earth Observatory of Columbia Univ, Palisades, NY 10964-8000, and SOHL, Linda E., Lamont-Doherty Earth Observatory, PO Box 1000, Palisades, NY 10964-8000,

Back to the Earth System Processes - Global Meeting (June 24-28, 2001)