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Plateau lavas and diabase dikes of northwestern Newfoundland

Published online by Cambridge University Press:  01 May 2009

D. F. Strong
D. F. Strong
Affiliation:
Department of Geology, Memorial University of Newfounland, St John's, Newfoundland
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Summary

Thin undeformed tholeiitic plateau lavas and associated diabase dikes occur intermittently along the western margin of the Appalachian mountain system, and are clearly exposed at its northern extremity in northwestern Newfoundland. In Newfoundland there are consistent chemical differences between the diabase dikes and the plateau lavas which indicate that they were derived from different primary magmas. These differences, along with apparent age discrepancies, could be taken as supporting suggestions of several periods of continental rifting, but such an interpretation is not favoured by the present author.

Type
Articles
Information
Geological Magazine , Volume 111 , Issue 6 , November 1974 , pp. 501 - 514
Copyright
Copyright © Cambridge University Press 1974

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