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GSA2015 ANNUAL MEETING & EXPOSITION
GSA TODAY | MAY 2015 T148. Cenozoic Evolution of Tropical Biota and Environments: This session will bring together research on critical transitions
A Session Honoring the Contributions of Ann F. Budd throughout the geological record to further the understanding of
Disciplines: Paleontology, Diversity, Extinction, Origination; interactions between the biosphere, lithosphere, and atmosphere
Paleontology, Phylogenetic/Morphological Patterns; Paleontology, during transformative intervals in Earth’s history.
Paleoecology/Taphonomy
Advocates: James S. Klaus; Kenneth G. Johnson; Francesca R. T153. Mass Extinction Causality: Records of Anoxia, Acidification,
Bosellini; Thomas Stemann and Global Warming during Earth’s Greatest Crises
Disciplines: Paleontology, Diversity, Extinction, Origination;
This session honors the contributions of Ann F. Budd to under- Geochemistry; Volcanology
standing the systematics, paleoecology, and macroevolutionary Advocates: David P.G. Bond; Paul B. Wignall; Mike Widdowson
history of Cenozoic marine biota of the tropics in response to
changing oceanographic and climatic conditions. This session explores the paleontology, stratigraphy, and
geochemistry of mass extinctions, high-resolution records of
T149. Co-Evolution of Life and Planet: Broad-Scale Controls anoxia, ocean acidification, and global warming, and their mech-
on Biodiversity anistic links to the ultimate drivers of change (e.g., large igneous
Disciplines: Paleontology, Diversity, Extinction, Origination; province eruptions).
Paleoclimatology/Paleoceanography; Geochemistry
Advocates: Peter J. Harries; Richard J. Twitchett T154. Phanerozoic Evolution in the Oceans: Effects of Warming
and Chemical Changes
This session will explore links between the evolving Earth Disciplines: Paleontology, Diversity, Extinction, Origination;
system, including the geosphere, atmosphere, and biosphere Paleoclimatology/Paleoceanography
throughout Earth’s history, with particular emphasis on factors Advocates: Jere H. Lipps; Malcolm Barrie Hart
controlling and influenced by biodiversity at various spatial and
temporal scales. The history and evolution of benthic and pelagic marine
organisms have been impacted significantly by the five major
T150. Early and Middle Triassic Restructuring Following the and ~25 lesser Phanerozoic extinction and radiation events,
End-Permian Mass Extinction resulting in new ecosystems and biotas.
Disciplines: Paleontology, Diversity, Extinction, Origination;
Paleontology, Paleoecology/Taphonomy T155. Timing of the Origins and Evolution of Unicellular
Advocates: Carlie Pietsch; Margaret L. Fraiser Eukaryotes
Disciplines: Paleontology, Diversity, Extinction, Origination;
This session encourages contributions focused on redefining Paleontology, Phylogenetic/Morphological Patterns; Paleontology,
the Early and Middle Triassic recovery or “restructuring” intervals Paleoecology/Taphonomy
by characterizing chaotic paleoenvionmental conditions, Advocates: Malgorzata Moczydlowska-Vidal; Stanley Awramik;
including extreme temperature excursions and low oxygen events Heda Agic´
with comparison to changes in community diversity and ecolog-
ical complexity. This session involves a search for affinities of unicellular
eukaryotes by paleobiologic, biochemical, and ultrastructural
T151. Foraminiferal Responses and Recovery from methods, and timing of major lineage origins by fossil record with
Environmental Stressors the aim of reconstructing the tree of life and reconciling with
Disciplines: Paleontology, Diversity, Extinction, Origination; molecular clock estimates.
Paleontology, Paleoecology/Taphonomy; Marine/Coastal Science
Advocates: Michael Martínez-Colón; Benjamin J. Ross; Natasha T156. Earth Underfoot: New Frontiers in Ichnology and
Méndez-Ferrer Zoogeomorphology
Disciplines: Paleontology, Paleoecology/Taphonomy;
This session seeks to highlight mechanisms responsible for Paleontology, Biogeography/Biostratigraphy; Geomorphology
spatial, temporal, or physiological responses to natural and Advocates: Ilya V. Buynevich; Stephen T. Hasiotis; Brian F. Platt
anthropogenic environmental disturbances.
This session will feature recent discoveries in trace fossil
T152. Geobiology of Critical Transitions: Integrating Fossils, research, neoichnology, and zoogeomorphology, including novel
Proxies, and Models techniques for identifying and characterizing traces in a variety of
Disciplines: Paleontology, Diversity, Extinction, Origination; media, from continental to deep marine settings.
Geomicrobiology; Geochemistry
Advocates: A.D. Muscente; Natalia Bykova; Jesse S. Broce;
James D. Schiffbauer
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