A Late Pleistocene Tephra Layer in the Southern Great Basin and Colorado Plateau Derived from Mono Craters, California |
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| Authors: | David B Madsen Andrei M Sarna-Wojcicki Robert S Thompson |
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| Institution: | Environmental Sciences, Utah Geological Survey, Salt Lake City, Utah, 84114;Western Region Earth Surface Processes Team, Tephrochronology Laboratory, U.S. Geological Survey, Menlo Park, California, 94025;Central Region Earth Surface Processes Team, U.S. Geological Survey, Denver, Colorado, 80225 |
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| Abstract: | A newly identified tephra in stratified deposits in southwestern Utah, dated 14,000 14C yr B.P., may aid in correlating late Pleistocene deposits across parts of the southern Great Basin and west-central Colorado Plateau. Geochemical analyses of the ash suggest the tephra originated from Mono Craters, California, and most probably correlates with Wilson Creek ash #3. Because the ash is 2 mm thick 550 km from its source, the event may have been larger than others correlated to Mono Craters eruptions. |
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| Keywords: | Abbreviations: QuaternaryAbbreviations: tephraAbbreviations: Great BasinAbbreviations: Colorado PlateauAbbreviations: Mono Craters |
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