Fluvial terrace dating using in situ cosmogenic {sup 21}Ne [electronic resource]
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| Online Access: |
Online Access (via OSTI) |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Livermore, Calif : Oak Ridge, Tenn. :
Lawrence Livermore National Laboratory ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
1994.
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| Subjects: |
| Abstract: | Through the analysis of cosmic-ray produced radio-genic and stable nuclide concentrations, specifically ²¹Ne, we hope to date certain geomorphic features located along the tributaries of the Colorado River in the Eastern Grand Canyon and the Rainbow Plateau located in Utah. During the Quaternary, the Colorado River system was fed by glacial melting and run-off from the Wind River and Colorado Mountain Ranges. Past periods of aggradation allowed the emplacement of terrace features from debris flow activity. By dating such features we can further constrain the timing of key events such as river down cutting, terrace genesis/exposure age, and rates of surface erosion. Knowing the age and elevation of each terrace we can determine an average rate of down cutting of this river system. This, in turn, will offer information regarding alpine glaciation which is a sensitive indicator of global climate change. Studying the relative concentrations of these isotopic species in surface rocks can be useful in researching glacial periodicity and the relationship between solar activity and climate. |
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| Item Description: | Published through SciTech Connect. 12/01/1994. "ucrl-id--114972-3" "DE95009444" Sexton, E. [Univ. of Illinois, Chicago, IL (United States)]; Caffee, M. [Lawrence Livermore National Lab., CA (United States)] |
| Physical Description: | pp. 8, Paper 15 : digital, PDF file. |