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Stratigraphy, Sedimentology, Paleontology, and Paleomagnetism ofPliocene-Early Pleistocene Lacustrine Deposits in Two Cores fromWestern Utah

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1995
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2013-05-16 14:07:33

Summary

The data contained in this report represent our preliminary findingsof the analyses of two cores of Pliocene and early Pleistocenesediments from the eastern Great Basin. This is a collaborativeproject involving specialists from the USGS, Kansas State University,and the University of California-Davis in paleontology (Thompson,Buchner, Forester, Bradbury), stratigraphy and sedimentology (Oviatt,Kelsey, Bracht), and paleomagnetism and environmental magnetism(Roberts).

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We are investigating the paleoclimatic history of western Utah as part of the USGS GlobalChange and Climate History Program studies of long-term climatic changes in the westernUnited States. Our initial objective is to document the environmental conditions duringthe mid-Pliocene period of warmer-than-modern global climates (the focus of the USGSPliocene Research, Interpretation, and Synoptic Mapping [PRISM] project). We also seek todetermine how and when these conditions gave way to the late Quaternary pattern of climaticvariations (in which short periods of very moist climates have been separated by longperiods of arid conditions).
Locations of sites discussed in text. The shaded areas represent elevations above 6000ft (1829 m). Woodland and forest vegetation generally occurs above this elevation,steppe and desert below.
Locations of sites discussed in text. The shaded areas represent elevations above 6000ft (1829 m). Woodland and forest vegetation generally occurs above this elevation,steppe and desert below.

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