Age of the Cutler Dam Alloformation (Late Pleistocene), Bonneville Basin, Utah |
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| Authors: | Darrell S Kaufman Steve L Forman Jordon Bright |
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| Institution: | aDepartment of Geology and Department of Environmental Sciences, Northern Arizona University, Flagstaff, Arizona, 86011-4099, f1;bDepartment of Earth and Environmental Sciences, University of Illinois, Chicago, Illinois, 60607-7059;cQuaternary Sciences Program, Northern Arizona University, Flagstaff, Arizona, 86011-5644 |
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| Abstract: | Luminescence geochronology, especially infrared stimulated luminescence analyses on marsh mud, shows that a relatively deep lake reached its peak ( 1340 m above sea level) in the Bonneville basin 59,000±5000 yr ago. The age is consistent with nonfinite 14C ages and with amino acid geochronology on ostracodes. The Cutler Dam Alloformation was deposited during this lake cycle, which, like the subsequent Bonneville lake cycle, appears to have reached its maximum highstand following the peak of a global glacial stage (marine oxygen-isotope stage 4) but at a time when other records from North America show evidence for cold climate and expanded glacier ice. |
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| Keywords: | Abbreviations: Pluvial LakeAbbreviations: QuaternaryAbbreviations: Geochronology |
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