Earth System Processes 2 (8–11 August 2005)
Session No. 49 Thursday, August 11, 2005
1:30 PM-4:30 PM, Westin Hotel: Mayfair

T2. Proterozoic Oceans, Atmospheres, and Life

Guy M. Narbonne and Yanan Shen, Presiding
 Paper #Start Time
49-11:30 PM INVITED: PATTERN AND TIMING OF CYANOBACTERIAL EVOLUTIONARY DIVERSIFICATION: TOMITANI, Akiko, Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima-cho, Yokosuka 237-0061 Japan, tomitani@jamstec.go.jp.
49-21:50 PM INVITED: CORRELATION OF PALEOPROTEROZOIC GLACIAL DEPOSITS: EVIDENCE FOR THREE GLOBAL GLACIATIONS BETWEEN 2.4 AND 2.22 GA: BEKKER, Andrey, Geophysical Lab, Carnegie Institution of Washington, 5251 Broad Branch Road, Washington, DC 20015, a.bekker@gl.ciw.edu.
49-32:10 PM PRECAMBRIAN CHERTS AND THE EVOLUTION OF SEAWATER HALOGEN RATIOS: GOLDSMITH, Sarah L.1, GILMOUR, Jamie D.1, BURGESS, Ray1, KONHAUSER, Kurt O.2, and POLYA, Dave A.1, (1) School of Earth, Atmospheric and Environmental Science, University of Manchester, Williamson Building, Oxford Road, Manchester, M13 9PL, United Kingdom, sarah.l.goldsmith@stud.man.ac.uk, (2) Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3, Canada
49-42:30 PM INVITED: POSSIBLE BIOLOGICAL IMPLICATIONS OF MID-PROTEROZOIC OCEAN ANOXIA: ANBAR, Ariel, Dept of Geological Sciences and Dept of Chemistry & Biochemistry, Arizona State University, Tempe, AZ 85287-1404, anbar@asu.edu.
 2:50 PM Break
49-53:10 PM BIOMARKERS OF A SNOWBALL EARTH: OLCOTT, Alison N.1, CORSETTI, Frank A.1, SESSIONS, Alex L.2, and KAUFMAN, Alan J.3, (1) Department of Earth Sciences, Univ. of Southern California, Los Angeles, CA 90089, olcott@earth.usc.edu, (2) Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, (3) Geology, Univ of Maryland, College Park, MD 20742
49-63:30 PM NEOPROTEROZOIC OCEAN CHEMISTRY: STABLE ISOTOPE EVIDENCE FROM CHINA: SHEN, Yanan, Département des sciences de la Terre et de l'Atmosphère, Université du Quebec a Montreal, Centre GEOTOP-UQAM-McGill, CP 8888, succ. Centre-Ville, Montreal, QC H3C 3P8 Canada, shen.yanan@uqam.ca.
49-73:50 PM THE EDIACARA BIOTA: NEOPROTEROZOIC ORIGIN OF ANIMALS AND THEIR ECOSYSTEMS: NARBONNE, Guy M., Geological Sciences, Queen’s Univ, Kingston, ON K7L 3N6, narbonne@geol.queensu.ca.
49-84:10 PM KEYNOTE: ANIMALS, ACRITARCHS AND MOLECULAR CLOCKS: WHAT MAKES THE PROTEROZOIC DIFFERENT?: BUTTERFIELD, Nicholas J., Department of Earth Sciences, Univ of Cambridge, Downing Street, Cambridge, CB2 3EQ, United Kingdom, njb1005@esc.cam.ac.uk and PETERSON, Kevin J., Department of Biological Sciences, Dartmouth College, North College St, Hanover, NH 03755

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