EP32C:
The Development and Application of Chronometers in Geomorphology I

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Session ID#: 35613

Session Description:
Isotopes and other quantitative tracers are widely used to quantify rates of geomorphic processes and to fingerprint sediment sources and sinks. However, these techniques, including short-lived fallout radionuclides, cosmogenic radionuclides, optically stimulated luminescence, and thermochronology, all have methodological assumptions that limit their usefulness in geomorphology. This session invites studies using geochemical methods to investigate the rates and progress of landscape change with a particular focus on geomorphic response to perturbations such as environmental change, anthropogenic impact, and tectonic drivers. We also welcome studies that consider new developments in geochronologic techniques or test the limitations and assumptions behind commonly employed methods.
Primary Convener:  Sarah J Boulton, Plymouth University, Plymouth, PL4, United Kingdom
Conveners:  Amanda H Schmidt, Oberlin College, Oberlin, OH, United States, Paul R Bierman, University of Vermont, Rubenstein School of Environment and Natural Resources, Burlington, VT, United States and Kevin P Norton, Victoria University of Wellington, Wellington, New Zealand
Chairs:  Amanda H Schmidt, Oberlin College, Oberlin, OH, United States and Sarah J Boulton, Plymouth University, Plymouth, PL4, United Kingdom
OSPA Liaison:  Kevin P Norton, Victoria University of Wellington, School of Geography, Environment and Earth Sciences, Wellington, New Zealand

Cross-Listed:
  • T - Tectonophysics
Index Terms:

1115 Radioisotope geochronology [GEOCHRONOLOGY]
1140 Thermochronology [GEOCHRONOLOGY]
1824 Geomorphology: general [HYDROLOGY]
8107 Continental neotectonics [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Active faulting, hillslope preservation, and the formation of bedrock fault scarps: using cosmogenic 36Cl to quantify geomorphic change in areas of active extension and changing climate (Invited) (238708)
Laura C Gregory1, Daniel E. J. Hobley2, Luke N J Wedmore1, Gerald Roberts3, Gregory E Tucker4, Patience A Cowie5 and Kenneth J W McCaffrey6, (1)University of Leeds, Leeds, LS2, United Kingdom, (2)Cardiff University, School of Earth & Environmental Sciences, Cardiff, United Kingdom, (3)Birkbeck, University of London, Earth and Planetary Sciences, London, United Kingdom, (4)University of Colorado at Boulder, CIRES and Department of Geological Sciences, Boulder, CO, United States, (5)University of Bergen, Department of Earth Science, Bergen, Norway, (6)University of Durham, Department of Earth Sciences, Durham, United Kingdom
Spatial and Temporal Patterns of Motion Along the Malibu Coastal Fault Inferred from 10Be Erosion Rates (281947)
Eric W Portenga1,2, Marin Kristen Clark1 and Nathan A Niemi3, (1)University of Michigan, Ann Arbor, MI, United States, (2)Eastern Michigan University, Ypsilanti, MI, United States, (3)University of Michigan, Earth and Environmental Sciences, Ann Arbor, United States
Using meteoric Be-10 to identify sources of tsunami deposits (237235)
Atsunori Nakamura1, Yuki Sawai1, Junko Hara1, Dan Matsumoto1, Hiroyuki Matsuzaki2, Tetsuya Shinozaki1,3 and Koichiro Tanigawa1, (1)Geological Survey of Japan, AIST, Tsukuba, Japan, (2)The University of Tokyo, Bunkyo-ku, Japan, (3)University of Tsukuba, Center for Research in Isotopes and Environmental Dynamics, Tsukuba, Japan
Variability in the Depositional Age of Alluvial Fill Overlying Strath Terraces: Implications for Determining River Incision Rates Using Optically Stimulated Luminescnece Dating (Invited) (263819)
Amanda Keen-Zebert, Desert Research Institute Reno, Reno, NV, United States, Kathleen Rodrigues, Desert Research Institute, Reno, United States and Stephanie L Shepherd, Auburn University, Geology and Geography, Auburn, AL, United States
Late Quaternary fluvial incision and aggradation in the Lesser Himalaya, India (217238)
Anthony Dosseto, University of Wollongong, Wollongong Isotope Geochronology Laboratory, School of Earth and Environmental Sciences, Wollongong, NSW, Australia, Jan-hendrik May, University of Melbourne, Melbourne, Australia, Jeong-Heon Choi, KBSI Korea Basic Science Institute, Division of Earth and Environmental Sciences, Seoul, South Korea, Zachary J Swander, University of Wollongong, Wollongong Isotope Geochronology Laboratory, School of Earth and Environmental Sciences, Wollongong, Australia, David Fink, Australian Nuclear Science and Technology Organization, Kirrawee, NSW, Australia, Oliver Korup, University of Potsdam, Potsdam, Germany, Paul P Hesse, Macquarie University, Sydney, NSW, Australia, Tejpal Singh, CSIR Central Scientific Instruments Organisation, Chandigarh, India and Pradeep Srivastava, Indian Institute of Technology Roorkee, Department of Earth Sciences, Roorkee, India
Investigating the Usefulness of Cosmogenic in situ 14C for the Dating of Alluvial Fan Surfaces (235521)
Brent M Goehring, Tulane University of Louisiana, Department of Earth and Environmental Sciences, New Orleans, LA, United States, Kimberly Blisniuk, San Jose State University, Department of Geology, San Jose, United States and Seulgi Moon, University of California Los Angeles, Department of Earth, Planetary, and Space Sciences, Los Angeles, CA, United States
Insights into Meteoric 10Be Dynamics and Climate Stability along the Hawaiian Kohala Climosequence (277600)
Jean Dixon, Montana State University-Bozeman, Bozeman, MT, United States and Oliver Chadwick, University of California, Santa Barbara, CA, United States
Dust and chemical erosion biases in cosmogenic nuclide studies: A factor-of-ten problem that could mask strong climatic effects on landscape evolution (208462)
Clifford S Riebe1, Lindsay Arvin1, Ken Ferrier2 and Sarah Aciego3, (1)University of Wyoming, Laramie, WY, United States, (2)Georgia Institute of Technology, Earth and Atmospheric Sciences, Atlanta, GA, United States, (3)University of Michigan, Ann Arbor, MI, United States

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