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Molluscan Assemblages from the Late Cenozoic of the Lower Omo Basin, Ethiopia

Published online by Cambridge University Press:  20 January 2017

Dirk Van Damme  and
Achilles Gautier
Dirk Van Damme
Affiliation:
Geologische Instituut, Rijksuniversiteit Gent, Belgium
Achilles Gautier
Affiliation:
Geologische Instituut, Rijksuniversiteit Gent, Belgium
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Abstract

The lower Omo basin, southern Ethiopia, preserves formations of sedimentary and pyroclastic rocks which span a substantial range of later Cenozoic time. These formations are often extraordinarily rich in vertebrate fossils and have also afforded a series of molluscan assemblages from contexts radiometrically dated by K/Ar or 14C. The late Cenozoic molluscan fauna has been previously ill-known in this part of Africa and these assemblages provide a broad faunal zonation for the northern sector of the Eastern Rift valley. The five principal assemblages are here treated as faunal groupings, rather than as formal faunal zones. Three groupings are recognized for the Pliocene/Pleistocene time range, one grouping for the later Pleistocene and one grouping for the subrecent and present.

Type
Research Article
Information
Quaternary Research , Volume 2 , Issue 1 , July 1972 , pp. 25 - 37
Copyright
Academic Press, Inc.

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