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This session will enhance our understanding of the roles of nat- T131. Mountain Glaciation and Climate Change of
ural organic matter (NOM) in biogeochemical cycling of trace and the Past and Present
redox sensitive elements of human health concerns in surface and Disciplines: Geomorphology, Quaternary Geology,
groundwater systems. Paleoclimatology/Paleoceanography
Advocates: Benjamin Laabs; Keith A. Brugger; Eric M. Leonard
GEOMORPHOLOGY Mountain glaciers and the Quaternary record of mountain
glaciation can yield valuable insights into climatic change. This
T127. Advances in Geomorphology: Understanding session brings together studies of modern and past mountain
How Interactions among Climatic, Tectonic, Fluvial, glaciation and their implications for reconstructing the dynamics
and Hillslope Processes Drive Topographic Change of glacier change through time.
Endorsers: GSA Soils and Soil Processes Division;
GSA Quaternary Geology and Geomorphology Division T132. Sediment Residence Times and Thresholds
Disciplines: Geomorphology, Quaternary Geology, Tectonics/ for Sediment Transport in Fluvial Corridors
Tectonophysics Endorsers: GSA Quaternary Geology and Geomorphology
Advocates: Adrian Bender; Sean Gallen; Karin Lehnigk; Division; GSA Sedimentary Geology Division; GSA Geoinformatics
Charles Shobe and Data Science Division; GSA Geochronology Division
We solicit multidisciplinary contributions that advance under- Disciplines: Geomorphology, Geochronology, Quaternary Geology
standing of how climate and tectonics drive interactions among Advocates: Kristin Jaeger; Nicholas Sutfin
bedrock river incision, landslide erosion, weathering, hydrology, This session explores sediment residence times, transit times, and
and fluvial sediment transport that control topographic change thresholds for transport in river channels and floodplains through
across all spatiotemporal scales. field, modeling, and analysis of remotely sensed approaches.

T128. Biogeomorphic Responses to Wildfire in T133. Weathering and Soils: Advances in Under-
Fluvial Ecosystems standing Rates, Mechanisms, Controlling Factors
Endorsers: GSA Quaternary Geology and Geomorphology and Feedbacks
Division; GSA Geology and Society Division; GSA Soils and Soil Endorsers: GSA Quaternary Geology and Geomorphology
Processes Division Division; GSA Soils and Soil Processes Division
Disciplines: Geomorphology, Quaternary Geology, Disciplines: Geomorphology, Soils, Geochronology
Environmental Geoscience Advocates: Brendon J. Quirk; Jennifer Aldred; Arjun M. Heimsath;
Advocates: Joan L. Florsheim; Alison P. O’Dowd; Anne Chin Rachel C. Glade
Conceptualizing rivers as ecosystems acknowledges intercon- We welcome studies seeking to understand and quantify processes
nected and complex interactions among geomorphic, ecological, and rates of weathering and soil formation and their feedbacks with
biogeochemical, and human processes. This session gathers inter- surface processes—particularly in the context of the climatic-, envi-
disciplinary researchers addressing wildfire as it changes riparian ronmental-, and material-properties that dictate their progression.
and in-stream communities and physical habitats within fluvial
systems, including channels, hillslopes, and floodplains. QUATERNARY GEOLOGY

T129. Dynamics of Huge Floods T134. Advances in Wildfire-Related Earth-
Disciplines: Geomorphology, Quaternary Geology, Sediments, Surface Processes
Clastic Endorsers: GSA Quaternary Geology and Geomorphology
Advocates: Roger P. Denlinger; Richard Waitt Division; GSA Environmental and Engineering Geology Division;
Decades of research, development, and fieldwork on huge GSA Geology and Society Division
floods worldwide define the character and substantial geomorphic Disciplines: Quaternary Geology, Geomorphology,
impact of these remarkable phenomena. We now relate outcrops to Environmental Geoscience
flows over thousands of kilometers, with surprising results. Advocates: Ann Youberg; Luke McGuire; Francis K. Rengers
We encourage researchers to present a broad range of topics
T130. Military Geosciences: Past Lessons and related to wildfires and earth-surface processes, including field
Modern Challenges studies, hazard analyses, emerging trends, landscape evolution
Endorsers: GSA Quaternary Geology and Geomorphology studies, and deep record geologic studies.
Division; GSA Soils and Soil Processes Division; GSA Geology
and Society Division; GSA Environmental and Engineering T135. Dynamics of the Laurentide Ice Sheet
Geology Division Endorsers: GSA Quaternary Geology and Geomorphology
Disciplines: Geomorphology Division; GSA Marine and Coastal Geoscience Division
Advocates: Eric V. McDonald; Sally A. Shoop; Brad Sion; Discipline: Quaternary Geology
J. Bruce J. Harrison; Steven N. Bacon Advocates: Timothy G. Fisher; Randall Schaetzl
The goal of this session is to bring together earth scientists who We encourage papers and posters on the timing, extent, and
apply geomorphic, hydrologic, remote sensing, soil, infrastructure dynamics of the Laurentide Ice Sheet. Presentations should focus
assessment, computational, and environmental methods to support on build up to the Last Glacial Maximum (LGM), LGM, and post-
a wide range of military activities. LGM events.
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