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Disciplines: Petrology, Metamorphic, Petrology, Igneous, Advocates: Suzanne Baldwin; Sumit Chakraborty; Matthew J. Kohn;
Precambrian Geology Clare Warren
Advocates: Chris Yakymchuk; Julia A. Baldwin; Mark J. Caddick We seek contributions that shed light on metamorphic processes
We welcome contributions from the broad field of metamorphic through the integration of petrology, geochemistry, and geo- and
geology ranging from the micro- to macroscale, from low- to thermochronology using isotopes, trace elements, mineral equilib-
high-grade and from field- to modeling-based to reflect Mike’s ria, and kinetics.
multidisciplinary research contributions to metamorphic geology
and understanding secular change. T30. Using Hydrochemistry to Conceptualize
Relations between Recharge and Discharge in Karst
GEOCHEMISTRY Aquifers
Endorsers: GSA Hydrogeology Division; GSA Karst Division
T26. Environmental Geochemistry and Health Discipline: Geochemistry
Endorsers: GSA Geology and Health Division; GSA Environmental Advocates: Rebecca R. Nunu; MaryLynn Musgrove
and Engineering Geology Division; GSA Hydrogeology Division; We welcome submittals that discuss the use of hydrogeochemical
GSA Geology and Society Division; GSA Soils and Soil Processes analyses in karst terrains to investigate: location of spring
Division recharge areas; time of transport to discharge; source, timing,
Disciplines: Geochemistry, Environmental Geoscience, Geology and nature of recharge; water-rock interaction in spring catchment
and Health areas; and flow pathways.
Advocates: Jean M. Morrison; Ann Ojeda; Sarah Hayes;
Nico Perdrial GEOCHRONOLOGY
We encourage presentations on the environmental fate of con-
taminants and their impact on human and environmental health. T31. Assessing Causes, Consequences, and Time Scales
Transdisciplinary contributions, those examining the rock-soil- of Miocene Climate and Environmental Change
water-human nexus at all scales having strong public outreach Endorser: GSA Geochronology Division
or societal impact, are welcome. Disciplines: Geochronology, Paleoclimatology/Paleoceanography,
Paleontology, Biogeography/Biostratigraphy
T27. Evolution of Earth’s Surface: Honoring Advocates: Jennifer J. Kasbohm; Alexander J. Lowe
Xiao-Ming Liu, Recipient of the 2021 Mineralogy, Inviting contributions exploring terrestrial and marine records
Geochemistry, Petrology, and Volcanology Division’s and/or modeling of Miocene environmental change and its pos-
Early Geological Career Award sible causes, preferably in the context of well-resolved geochrono-
Endorsers: GSA Mineralogy, Geochemistry, Petrology, and logical frameworks, to assess time scales of the earth system
Volcanology Division; Geochemical Society response to perturbations.
Disciplines: Geochemistry, Precambrian Geology, Sediments,
Carbonates T32. Magnets in the Time of Geology: The Many
Advocates: Roberta L. Rudnick; Timothy W. Lyons; Fang-Zhen Teng Roles of Paleomagnetism in Telling Geological Time
How, when, and why has Earth’s surface evolved over geologic Endorsers: GSA Geochronology Division; GSA Structural
time? Secular changes in atmosphere, oceans, and crust have all Geology and Tectonics Division; GSA Geophysics and
been documented or proposed. The session will explore the record Geodynamics Division
and causes of these changes. Disciplines: Geochronology, Structural Geology, Geophysics/
Geodynamics
T28. Groundwater–Surface Water Interactions in Advocates: Anthony Pivarunas; Joseph G. Meert; Courtney Sprain
Streams, Lakes, and Wetlands Knowing “when,” “for how long,” or “at what rate” something
Endorsers: GSA Hydrogeology Division; GSA Karst Division; occurred is fundamental to geology. Paleomagnetism is used in
GSA Soils and Soil Processes Division varied ways, in concert with varied disciplines, to address such
Disciplines: Geochemistry, Geophysics/Geodynamics, questions throughout all of Earth’s history.
Limnogeology
Advocates: Zeno Levy; Masaki Hayashi ECONOMIC GEOLOGY
This session encourages contributions that cover research on
groundwater–surface water interactions in a broad range of T33. Magnetite Apatite (MtAp) Deposits in
aquatic environments using a variety of methods including hydro- Space and Time
logical field measurements, aqueous geochemistry, hydrogeophys- Endorsers: Mineralogical Society of America; Society of
ics, and mathematical modeling. Economic Geologists
Discipline: Economic Geology
T29. Metamorphic Geochemistry without Borders: Advocates: John M. Hanchar; Jeffrey Chiarenzelli; Marian
To Honor 2020 Dana Medalist Daniela Rubatto Lupulescu; Fernando Tornos
Endorsers: Mineralogical Society of America; GSA Structural Magnetite apatite (MtAp) ore deposits, sometimes referred to
Geology and Tectonics Division; GSA Mineralogy, Geochemistry, as iron oxide-apatite (IOA) deposits, are one of the most debated
Petrology, and Volcanology Division types of mineralization, are an important source of iron, and are
Discipline: Geochemistry a potential resource for rare earth elements.
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