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GSA 2017 ANNUAL MEETING & EXPOSITION
T55. Life and Times in the Early Paleozoic T59. Studies in Paleobiology and Paleoecology: In Honor of
Professor David J. Bottjer
Cosponsor: Paleontological Society
Cosponsors: GSA Geobiology & Geomicrobiology Division;
Disciplines: Paleontology, Diversity, Extinction, Origination, Paleontological Society; SEPM (Society for Sedimentary Geology);
Paleoclimatology/Paleoceanography, Geochemistry Paleontological Research Institution
Advocates: Erik A. Sperling; Stephen Leslie; Matt Saltzman Disciplines: Paleontology, Diversity, Extinction, Origination,
Paleontology, Paleoecology/Taphonomy, Paleontology, Phylogenetic/
This session welcomes submissions on early Paleozoic biotic Morphological Patterns
radiations and extinctions and their relationship (or not) to any
aspect of the evolving Earth system. Advocates: Thomas J. Algeo; Pedro J. Marenco; Margaret L.
Fraiser; Matthew E. Clapham
T56. Mass Extinctions: Past, Present, and Future?
This session honors Professor David Bottjer on the occasion
Cosponsors: Paleontological Research Institution; GSA of his stepping down as Editor-in-Chief of Palaeogeography
Mineralogy, Geochemistry, Petrology, and Volcanology Division; Palaeoclimatology Palaeoecology after 16 years. He is a paleo-
Cushman Foundation for Foraminiferal Research; biologist and paleoecologist working on organism-sediment inter-
Paleontological Society; Volcanic and Magmatic Studies Group actions, early metazoan life, and recovery from mass extinctions.
Disciplines: Paleontology, Diversity, Extinction, Origination, T60. The Onset of the Great Ordovician Biodiversity Event
Geochemistry, Stratigraphy (GOBE): Testing Hypotheses with Diverse Data Sets
Advocates: David P.G. Bond; Thierry Adatte; Gerta Keller; Cosponsors: Paleontological Society; GSA Geobiology &
Dougal A. Jerram Geomicrobiology Division; GSA Sedimentary Geology Division;
SEPM (Society for Sedimentary Geology); IGCP 653: Onset of
This session examines micro- and macrofaunal and floral the Great Ordovician Biodiversification Event; Paleontological
records of extinction from deep time to the present, proxies for Research Institution
contemporaneous environmental changes and their ultimate
drivers (e.g., large igneous province eruptions, bolide impacts, Disciplines: Paleontology, Diversity, Extinction, Origination,
anthropogenic change). Stratigraphy, Paleoclimatology/Paleoceanography
T57. Mercury in the Geologic Record Advocates: Rebecca L. Freeman; Alycia L. Stigall
Cosponsor: GSA Mineralogy, Geochemistry, Petrology, and We request contributions testing hypotheses concerning the
Volcanology Division Late Cambrian to Ordovician biotic and abiotic drivers of
GOBE. Diverse data sets illuminate the timing, initiating condi-
Disciplines: Paleontology, Diversity, Extinction, Origination, tions, stratigraphy, and paleontology of this significant event in
Geochemistry, Volcanology Earth’s history.
Advocate: Stephen E. Grasby T61. Tracking Deccan Volcanism and Biotic Change in
Terrestrial Ecosystems across the Cretaceous-Paleogene of India
Mercury is an effective proxy for volcanism in the geologic
record. This session will examine Hg across major events in Earth Cosponsor: Paleontological Society
history, processes that influence Hg in the rock record, and stable
isotope studies. Disciplines: Paleontology, Diversity, Extinction, Origination,
Geochemistry, Volcanology
T58. Oxygen and Ecosystems from the Proterozoic to
the Paleozoic Advocates: Gregory P. Wilson; Jeffrey A. Wilson; Paul Renne
Cosponsors: Paleontological Research Institution; India is central to the Cretaceous-Paleogene mass extinction
Paleontological Society; GSA Geobiology & Geomicrobiology and the Indo-Asian biotic interchange. This session will bring
Division together geologists and paleontologists to highlight advances in
our understanding of the Deccan traps and India’s biotic changes.
Disciplines: Paleontology, Diversity, Extinction, Origination,
Precambrian Geology, Geochemistry T62. Ancient Environments of South America
Advocates: Noah J. Planavsky; Devon B. Cole; Christopher Cosponsors: Paleontological Research Institution;
T. Reinhard Paleontological Society; GSA Sedimentary Geology Division
This session will explore recent efforts to develop a more com- Disciplines: Paleontology, Paleoecology/Taphonomy
prehensive understanding of coupled oxygen availability and
environmental conditions with biotic evolution and ecosystem Advocates: Camilla Crifò; Regan E. Dunn
development from the Proterozoic to the early Paleozoic.
The aim of this session is to reunite with an integrative per-
spective paleontologists, paleoecologists, paleobotanists, geo-
chemists, and sedimentologists whose main focus is the deep
time paleontological, biogeographic, and geologic history of the
South American continent.
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