Geological Society of America

8:05 AM

NEW AGE CONSTRAINTS FOR THE BASAL CAMBRIAN PERIOD: GEOCHRONOLOGY OF THE LOWER WOOD CANYON FORMATION, NEVADA, USA

Lyle Nelson, Carleton University, Ottawa, ON and James L. Crowley, Boise State University, Boise, ID and Emily F. Smith, Johns Hopkins University, Baltimore, MD and Darin Schwartz, Boise State University, Boise, ID and Eben Hodgin, Brown University, Providence, RI and Mark Schmitz, Boise State University, Boise, ID

391194 (Technical Sessions)

8:20 AM

CHANGING SEAWATER CARBON ISOTOPE COMPOSITIONS AT THE EDIACARAN-CAMBRIAN BOUNDARY PRESERVED DUE TO EARLY MARINE DIAGENESIS IN SOUTHWESTERN LAURENTIA

Mary Lonsdale, Johns Hopkins University, Baltimore, MD and Anne-Sofie C. Ahm, University of Victoria, Victoria, BC and Lyle L. Nelson, Carleton University, Ottawa, ON and Jacob W. Thompson, Baltimore Polytechnic High School, Baltimore, MD and John A. Higgins, Princeton University, Princeton, NJ and Emily Smith, Johns Hopkins University, Baltimore, MD

393634 (Technical Sessions)

8:50 AM

WAS EARTH’S OLDEST MINERAL COLLECTOR A CNIDARIAN? MORPHOLOGICAL, MINERALOGICAL, AND MICROSTRUCTURAL ANALYSIS OF SALTERELLA

Prescott Vayda, Virginia Tech, Blacksburg, VA and Shuhai Xiao, Virginia Tech, Blacksburg, VA and Noah Keller, Virginia Tech, Blacksburg, VA and Justin Strauss, Dartmouth College, Hanover, NH and Mary C. Lonsdale, Johns Hopkins University, Baltimore, MD and Amy Hagen, Virginia Tech, Blacksburg, VA

389588 (Technical Sessions)

9:50 AM

UNUSUAL IRON CYCLING AND REDOX CONDITIONS IN THE LOWER CAMBRIAN HARKLESS FORMATION

Amy Hagen, Virginia Tech, Blacksburg, VA and Benjamin Gill, Virginia Tech, Blacksburg, VA and Sara B. Pruss, Smith College, Northampton, MA and Prescott Vayda, Virginia Tech, Blacksburg, VA

390928 (Technical Sessions)

10:05 AM

PRECISE U-PB ZIRCON DATE SUCCESSION THROUGH FOSSILIFEROUS AVALONIAN LOWER–MIDDLE CAMBRIAN BOUNDARY INTERVAL AND EVALUATION OF THE MIAOLINGIAN AS A GLOBAL CAMBRIAN SERIES

Ed Landing, Albany, NY and Mark Schmitz, Boise State University, Boise, ID and Stephen R. Westrop, Univ of Oklahoma, Norman, OK and Gerd Geyer, Universität Würzburg, Würzburg

393819 (Technical Sessions)

10:20 AM

THE MID-CAMBRIAN MARJUM SOFT-BODIED BIOTA – A FOSSIL TREASURE TROVE IN THE WEST DESERT OF UTAH

Rudy Lerosey-Aubril, Harvard University, Cambridge, MA and Robert Coleman, Round Lake Beach, IL and Lucas Del Mouro, University of São Paulo, São Paulo and Robert R. Gaines, Pomona College, Claremont, CA and Luke Parry, University College London, London and Jacob Skabelund, Wellsville, UT and Javier Ortega-Hernandez, Harvard University, Cambridge, MA

392676 (Technical Sessions)

10:35 AM

LATE CAMBRIAN AND EARLY ORDOVICIAN TRILOBITES FROM THE SOUTHERN SHAN STATE, MYANMAR

Horus Balogh-Zanin, University of California, Riverside, Riverside, CA and Shelly Wernette, Texas State University, San Marcos, TX and Paul Myrow, Colorado College, Colorado Springs, CO and Aye Ko Aung, East Dagon Township, Yangon and Nigel C. Hughes, University of California- Riverside, Riverside, CA

390843 (Technical Sessions)

10:50 AM

ECOLOGICAL NOVELTY AT THE START OF THE CAMBRIAN AND ORDOVICIAN RADIATIONS OF ECHINODERMS

Philip Novack-Gottshall, Benedictine University, Lisle, IL and Jack Nathan Purcell, Benedictine University, Lisle, IL and Ali Sultan, Benedictine University, Lisle, IL and Ali Sultan, University of Michigan, Ann Arbor, MI and Isa Ranjha, Benedictine University, Lisle, IL and Bradley Deline, University of West Georgia, Carrollton, NY and Colin Sumrall, University of Tennessee, Knoxville, TN

391330 (Technical Sessions)

11:05 AM

TESTING THE HYDRODYNAMIC BEHAVIOUR OF THE FIRST SWIMMING APEX PREDATORS – COMPARISONS BETWEEN CAMBRIAN AND ORDOVICIAN RADIODONTS

Martin Fernandez, Syracuse University, Syracuse, NY and Stephen Pates, Cambridge and Javier Ortega-Hernandez, Harvard University, Cambridge, MA and Karma Nanglu, Harvard University, Cambridge, MA

395546 (Technical Sessions)

T9 The Early Paleozoic I: Radiations, Extinctions, and Environment

Presentations