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USGS · 70188748

Uranium-series and soil-geomorphic dating of the Calico archaeological site, California

James L. Bischoff·Roy J. Shlemon·T. L. Ku·R.D. Simpson·Robert J. Rosenbauer·Budinger
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Abstract

Lithic specimens identified as artifacts have been recovered from near the base of the Yermo fan deposits at Calico, California. The soil on the fan surface is a strongly developed relict paleosol. Comparison of this soil with dated paleosols elsewhere in the southwestern United States suggests that the surface is about 80,000 to 125,000 yr old. Clasts near the base of the deposit are well cemented by laminated CaCO 3 that probably formed from groundwater action while the fan was still active. Uranium-thorium assays on the CaCO 3 indicate an age of 200,000 yr.

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90° N90° S · 180° W ← longitude → 180° E
Source-reported bounding extent: 34.83522280367885° to 35.13226374917891° latitude; -117.04559326171874° to -116.68991088867188° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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James L. Bischoff, Roy J. Shlemon, T. L. Ku, R.D. Simpson, Robert J. Rosenbauer, Budinger. 1981. Uranium-series and soil-geomorphic dating of the Calico archaeological site, California. https://doi.org/10.1130/0091-7613(1981)9%3C576%3Auasdot%3E2.0.co%3B2

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