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GSA 2017 ANNUAL MEETING & EXPOSITION
T248. Microbialite Textures and Chemical Signatures in
Continental Settings: Forging the Link between the Modern
and Ancient
Cosponsors: GSA Geobiology & Geomicrobiology Division;
GSA Limnogeology Division; GSA Karst Division
Disciplines: Geomicrobiology, Limnogeology, Planetary Geology
Advocates: Thomas A. Hickson; Julie K. Bartley
We seek abstracts that focus on the textures (macro- and
microscopic) and geochemical signatures of microbial activity
in continental settings. These abstracts should clearly forge a
strong link between ancient rock sequences and modern biogeo-
chemical processes.
T249. New Voices in Geobiology
Cosponsors: GSA Geobiology & Geomicrobiology Division;
GSA Karst Division
Disciplines: Geomicrobiology, Geochemistry, Paleoclimatology/
Paleoceanography
Advocates: Victoria A. Petryshyn; Marc Laflamme; Lydia S.
Tackett; Rowan C. Martindale; Simon A.F. Darroch; Carie M. Frantz
The goal of this session is to bring together new research focus- Advocates: W. Bleeker; Andrey Bekker; Ross Mitchell
ing on the interplay between geologic and biologic processes with
a special emphasis on new field sites, novel materials/methods,
and the development/refinement of proxies.
T250. Perspectives on The Deep Biosphere: Twenty-Five Years
of Geobiology
Cosponsor: GSA Geobiology & Geomicrobiology Division
Discipline: Geomicrobiology
Advocates: John R. Spear; Blake W. Stamps
A critical yet little understood compartment of Earth is the life Disciplines: Precambrian Geology, Geomicrobiology, Geochemistry
that lies beneath, the deep biosphere. Rich in geological, geo-
chemical, and biological complexity, the subsurface continually
supplies ecosystem services that maintain life on the surface.
.MARINE/COASTAL SCIENCE
T251. Tsunami Hazards: Innovations in Mapping,
Modeling, and Outreach
Cosponsors: GSA Environmental and Engineering Geology
Division; Washington Division of Geology and Earth Resources;
GSA Geoinformatics Division
Disciplines: Marine/Coastal Science, Engineering Geology,
Geoscience Information/Communication
Advocates: Corina Forson; Timothy J. Walsh
In Washington and Oregon there is new tsunami-inundation
modeling, evacuation mapping, and the first vertical-evacuation
structure. Additionally, there are new regulations on designing for
tsunami inundation and how to build accordingly.
50 22–25 October 2017 • Seattle, Washington, USA
.PRECAMBRIAN GEOLOGY
T252. Cratonic Assembly in the Precambrian: Forming
the Core of Modern and Ancient Landmasses
Cosponsor: GSA Structural Geology and Tectonics Division
Disciplines: Precambrian Geology, Tectonics/Tectonophysics,
Geophysics/Geodynamics
Advocates: Anthony F. Pivarunas; Joseph G. Meert;
Scott R. Miller
Precambrian and younger supercontinents are composed of
continents and the individual cratonic nuclei that make up those
landmasses. Documenting the progressive assembly of cratons to
form Rodinia and Columbia is a requirement for accurate
reconstructions.
T253. Did Earth History Repeat Itself? Turning Points at
the Beginning and End of the Proterozoic That Involved
Geodynamics, Surface Redox, Life
Cosponsor: Paleontological Society
Disciplines: Precambrian Geology, Geochemistry, Tectonics/
Tectonophysics
Both ends of the Proterozoic eon are marked by a similar
sequence of events. We hope to assemble a diverse group of
speakers to address long-term patterns in the evolution of the
earth system.
T254. The Co-Evolution of Life and Its Environment during
the Precambrian: The “Boring Billion” and Mid-Proterozoic
Emergence of Complex Life
Cosponsors: Paleontological Society; GSA Geobiology &
Geomicrobiology Division
Advocates: Roger Buick; Matthew Koehler; Charles Diamond
This session explores the middle chapter of Earth’s history,
which was characterized by an apparently prolonged period of
biogeochemical stasis. Contributions that consider Proterozoic
redox conditions, early eukaryotic evolution, long-term climatic
regulation, and biogeochemical cycling are encouraged.
T255. The Co-Evolution of Life and Its Environment during
the Precambrian: The Late Proterozoic Rise of Animals;
Climate, Tectonic, and Environmental Dynamics, and the
Transition into the Early Paleozoic
Cosponsors: Paleontological Society; GSA Sedimentary
Geology Division
Disciplines: Precambrian Geology, Geochemistry, Geomicrobiology
Advocates: Michael Kipp; J. Alex Zumberge; Timothy W. Lyons
This session explores the dynamic transitions of the
Neoproterozoic, and particularly welcomes contributions that
assess marine redox heterogeneity, cause-effect relationships
between tectonic, climatic and biological evolution, and the
chronology of these critical events.