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Science 6 November 1998:
Vol. 282. no. 5391, pp. 1097 - 1099
DOI: 10.1126/science.282.5391.1097
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Reports

Ages of Prehistoric Earthquakes Revealed by Cosmogenic Chlorine-36 in a Bedrock Fault Scarp at Hebgen Lake

Marek Zreda, Jay S. Noller

Cosmogenic chlorine-36 reveals dates of the multiple prehistoric earthquakes that have produced a scarp on the Hebgen Lake fault. Apparent chlorine-36 ages are stratigraphically correct, follow a predicted theoretical pattern, and produce geologically reasonable model ages of 24, 20, 7.0, 2.6, 1.7, and 0.4 thousand years ago. This result demonstrates the feasibility of using cosmogenic chlorine-36 to extract paleoearthquake records from bedrock fault scarps.

M. Zreda, Department of Hydrology and Water Resources, University of Arizona, Tucson, AZ 85721, USA. J. S. Noller, Department of Geology, Vanderbilt University, Nashville, TN 37235, USA.

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Geomorphological applications of cosmogenic isotope analysis.
H. A.P. Cockburn and M. A. Summerfield (2004)
Progress in Physical Geography 28, 1-42
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Accelerator mass spectrometry in geologic research.
P. Muzikar, D. Elmore, and D. E. Granger (2003)
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