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

Author:

Zreda Marek1,Noller Jay S.1

Affiliation:

1. 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.

Abstract

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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference31 articles.

1. J. P. McCalpin Ed. Paleoseismology vol. 62 of International Geophysics Series (Academic Press San Diego CA 1996).

2. J. S. Noller J. M. Sowers W. R. Lettis Eds. Quaternary Geochronology: Applications in Quaternary Geology and Paleoseismology (American Geophysical Union Washington DC in press).

3. W. B. Myers and W. Hamilton U.S. Geol. Surv. Prof. Pap. 435 58 (1964).

4. I. J. Witkind ibid. p. 37.

5. CHLORINE-36 IN NATURE

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