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Upper Pleistocene mollusca from Potrero Canyon, Pacific Palisades


, : Upper Pleistocene mollusca from Potrero Canyon, Pacific Palisades. California Trans San Diego Soc Nat Hist 12(10): 181-205

A collection containing 227 spp. and vars., made in 1943 by F. C. Clark from sites now destroyed by human building activities, includes 128 spp. and vars. previously unreported from the Upper Pleistocene of Potrero Canyon. Previous work on the mollusks of this locality is reviewed. Stratigraphy of the terrace deposits, paleoecology, and inferred depositional environment are discussed. The fossil locality lay no farther than half a mile from shore and under a probable maximum of 5 fathoms of water. The waters were probably fairly quiet, but deep water or ocean types of organisms must have been swept inshore by occasional storm waves. A check-list of the fossils is given, with indication, in tabulated form, of reports by other authorities.

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