Late Quaternary Nonmarine Mollusca from Kokoweef Cave, Ivanpah Mountains, California
Reynolds, Robert E.
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An assemblage of one freshwater and seven terrestrial mollusk species <br /><br />was collected in Kokoweef Cave, at 1720 m in the Ivanpah Mountains, San <br /><br />Bernardino County, California, associated with vertebrate remains of Ranchola- <br /><br />brean (late Pleistocene) age. All but one of the molluscan taxa are extant. Most <br /><br />of the species indicate an environment like that of modem pine and fir forest now <br /><br />found at elevations above 2200 m in the Spring Range, Nevada. There is also a <br /><br />xerophilic element characteristic of the modem Lower Sonoran Zone. In the time <br /><br />interval represented by the fossils, the pine and fir forest zone probably extended <br /><br />500-1000 m lower than at present.