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An outline of the stratigraphy and palaeontology of the Ordovician rocks of Central Portugal

Published online by Cambridge University Press:  01 May 2009

W. I. Mitchell
W. I. Mitchell
Affiliation:
Geological Survey of Northern Ireland, 20 College Gardens, Belfast BT9 6BS
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Summary

Well-preserved brachiopod faunas collected from four Ordovician horizons range in age from Upper Llanvirn to Lower Caradoc. The generically restricted Upper Llanvirn and Lower Llandeilo assemblages are associated with diagnostic graptolites. In contrast the Upper Llandeilo and Lower Caradoc assemblages are more diverse and correlate well with faunas from the more precisely dated Chrustenice Substage in Bohemia. Two new brachiopod genera Apollonorthis and Cacemia are described.

Type
Articles
Information
Geological Magazine , Volume 111 , Issue 5 , September 1974 , pp. 385 - 396
Copyright
Copyright © Cambridge University Press 1974

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