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Pliocene Invertebrates From the Travertine Point Outcrop of the Imperial Formation, Imperial County, California

October 23, 2008

Forty-four invertebrate taxa, including one coral, 40 mollusks (30 bivalves and 10 gastropods), and three echinoids are recognized from a thin marine interval of the Imperial Formation near Travertine Point, Imperial County, California. The Travertine Point outcrop lies about midway between exposures of the Imperial Formation around Palm Springs, Riverside County, and exposures centered at Coyote Mountain in Imperial and San Diego Counties. Based on faunal comparisons, the Travertine Point outcrop corresponds to the Imperial and San Diego outcrops.

The Travertine Point fauna is inferred to have lived in subtropical to tropical waters at littoral to inner sublittorial (<50 m) water depths. Coral and molluscan species from the Travertine Point outcrop indicate a Pliocene age. Two extant bivalve mollusks present have not previously been reported as fossils Anadara reinharti and forms questionably referred to Dosinia semiobliterata.

Citation Information

Publication Year 2008
Title Pliocene Invertebrates From the Travertine Point Outcrop of the Imperial Formation, Imperial County, California
DOI 10.3133/sir20085155
Authors Charles L. Powell
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Scientific Investigations Report
Series Number 2008-5155
Index ID sir20085155
Record Source USGS Publications Warehouse
USGS Organization Western Earth Surface Processes

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