USAP-DC

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Collaborative Research: Systematic Analysis of Landscape Evolution and Surface Ages in Transantarctic Mountains Start Date: 2009-09-01 End Date: 2013-08-31 Description/Abstract This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The proposed project will investigate the coldest and driest parts of the Transantarctic Mountains (Ong Valley at Nimrod Glacier and Moraine Canyon at Amundsen Glacier) where the lack of running water and biological activity in the modern environment is thought to have preserved the landscape, essentially unchanged, for millions of years. Contrary to this common belief, it is hypothesized that the landscape does evolve, perhaps as fast as many surfaces in the Dry Valleys area where both loose soil and bedrock surfaces have been degrading at a rate of about 1-2 m/Myrs for the past several million years. The research team will rely on analysis of the both stable and radioactive cosmogenic isotopes that accumulate in near surface soil and bedrock. Collectively these measurements allow comparison of the long term landscape evolution to current processes and environmental drivers such as wind speed. The results of this work will improve understanding of the evolution of the Earth's surface and directly aid in evaluating imagery of Martian geomorphology. Continued reliance on students provides a broader impact to this proposed research and firmly grounds this effort in its educational mission. Personnel Person Role Balco, Gregory Investigator and contact Putkonen, Jaakko Investigator Morgan, Daniel Investigator Funding Antarctic Earth Sciences Award # 0838968 Antarctic Earth Sciences Award # 0838757 AMD - DIF Record(s) OPP-0838757 Data Management Plan None in the Database Product Level: 0 (raw data) Datasets Repository Title (link) Format(s) Status ICE-D Interface to observational data and geologic age information calculated therefrom None exists PI website Web page with links to files containing cosmogenic noble gas concentrations and related analytical data None exist Publications Bibby, T., Putkonen, J., Morgan, D., Balco, G., and Shuster, D. L. (2016), Million year old ice found under meter thick debris layer in Antarctica, Geophys. Res. Lett., 43, 6995– 7001 (doi:10.1002/2016GL069889) Putkonen, J., Morgan, D., & Balco, G. (2014). Boulder weathering in McMurdo Dry Valleys, Antarctica. Geomorphology, 219, 192–199. (doi:10.1016/j.geomorph.2014.05.012) Bibby, T., Putkonen, J., Morgan, D., Balco, G., & Shuster, D. L. (2016). Million year old ice found under meter thick debris layer in Antarctica. Geophysical Research Letters, 43(13), 6995–7001. (doi:10.1002/2016gl069889) Keywords Antarctica CENOZOIC GLACIERS/ICE SHEETS HOLOCENE PHANEROZOIC PLEISTOCENE QUATERNARY Platforms and Instruments