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Pleistocene Sedimentation and Fauna of the Argentine Shelf: II. Pleistocene Mollusks from the Continental Shelf off Argentina

Horace G. Richards and James R. Craig
Proceedings of the Academy of Natural Sciences of Philadelphia
Vol. 115 (1963), pp. 127-152
Stable URL: http://www.jstor.org/stable/4064559
Page Count: 26
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Pleistocene Sedimentation and Fauna of the Argentine Shelf: II. Pleistocene Mollusks from the Continental Shelf off Argentina
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Abstract

Forty species of pelecypods, 26 gastropods, two barnacles, one brachiopod and one scaphopod are reported from the sediment cores taken off the Argentine continental shelf. Take as a whole, the molluscan species suggest a littoral to shallow neritic zone of deposition. A few species suggest slightly warmer water than that of the same latitude today; the majority of the species can be found living in the same region today, while 14 are north of their present range. It is tentatively concluded that the shells from the Argentine cores indicate a cold, shallow sea. It is probable that the majority of these shells lived near the beach of a low sea level during the time of the Wisconsin glaciation. A few may date from an earlier glacial stage. This interpretation is confirmed by carbon-14 dates.

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