Late Quaternary Nonmarine Mollusca from Kokoweef Cave, Ivanpah Mountains, California
An assemblage of one freshwater and seven terrestrial mollusk species was collected in Kokoweef Cave, at 1720 m in the Ivanpah Mountains, San Bernardino County, California, associated with vertebrate remains of Ranchola- brean (late Pleistocene) age. All but one of the molluscan taxa are extant. Most of the species indicate an environment like that of modem pine and fir forest now found at elevations above 2200 m in the Spring Range, Nevada. There is also a xerophilic element characteristic of the modem Lower Sonoran Zone. In the time interval represented by the fossils, the pine and fir forest zone probably extended 500-1000 m lower than at present.
Roth, Barry and Reynolds, Robert E.
"Late Quaternary Nonmarine Mollusca from Kokoweef Cave, Ivanpah Mountains, California,"
Bulletin of the Southern California Academy of Sciences:
Available at: https://scholar.oxy.edu/scas/vol89/iss1/2