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Batyrbay Section, South Kazakhstan, U.S.S.R. – potential stratotype for the Cambrian–Ordovician Boundary

Published online by Cambridge University Press:  01 May 2009

M. K. Apollonov ,
M. N. Chugaeva ,
S. V. Dubinina  and
V. G. Zhemchuzhnikov
M. K. Apollonov
Affiliation:
Institute of Geological Sciences, Academy of Sciences of the Kazakh S.S.R., Kalinina 69–a Alma-Ata 480100, U.S.S.R.
M. N. Chugaeva
Affiliation:
Geological Institute, Academy of Sciences of the U.S.S.R., Pyzhevski per. 7 Moscow 109017, U.S.S.R.
S. V. Dubinina
Affiliation:
Geological Institute, Academy of Sciences of the U.S.S.R., Pyzhevski per. 7 Moscow 109017, U.S.S.R.
V. G. Zhemchuzhnikov
Affiliation:
Institute of Geological Sciences, Academy of Sciences of the Kazakh S.S.R., Kalinina 69–a Alma-Ata 480100, U.S.S.R.
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Abstract

The base of the Cordylodus proavus conodont Zone is the most appropriate horizon for the Cambrian–Ordovician Boundary. At Batyrbay the horizon reflects a significant global eustatic event that is marked by distinctive geochemical changes and by drastic changes in the trilobite and conodont faunas. The palaeomagnetic polarities change from reversal to normal just below this horizon.

Type
Articles
Information
Geological Magazine , Volume 125 , Issue 4 , July 1988 , pp. 445 - 449
Copyright
Copyright © Cambridge University Press 1988

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References

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