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Upper Cambrian Archaeocyatha from Antarctica

Published online by Cambridge University Press:  01 May 2009

F. Debrenne ,
A. Yu. Rozanov  and
G. F. Webers
F. Debrenne
Affiliation:
E.R. 154 C.N.R.S., 8 Rue Buffon, 75005 Paris, France.
A. Yu. Rozanov
Affiliation:
Palaeontological Institute of the U.S.S.R., Academy of Sciences, Moscow, B 49, U.S.S.R.
G. F. Webers
Affiliation:
Geology Department, Macalester College, St Paul, Minnesota, 55105, U.S.A.
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Abstract

Reconnaissance geological mapping (1962–75) followed by detailed geological investigations (1979–80) in the Ellsworth Mountains of west Antarctica have established the existence of extensive Middle and Late Cambrian strata. Forms tentatively referred to Archaeocyatha have been examined by F.D. and A.R., who concluded that, despite the commonly held opinion that the phylum became extinct at the boundary of the Lower and Middle Cambrian, the Ellsworth Mountains' forms represented Irregularian Archaeocyatha which survived in protected niches into the Late Cambrian. The age of the fauna containing the archaeocyaths is firmly dated by abundant trilobites including species of Homagnostus, Pseudagnostus, Kormagnostella, Erixanium and Onchopeltis.

Type
Articles
Information
Geological Magazine , Volume 121 , Issue 4 , July 1984 , pp. 291 - 299
Copyright
Copyright © Cambridge University Press 1984

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