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Layered gabbros in the Eastern Lizard, Cornwall, and their significance

Published online by Cambridge University Press:  01 May 2009

G. A. Kirby
G. A. Kirby
Affiliation:
Department of Geology, University of Southampton, Southampton
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Summary

Small-scale igneous layering and lamination have been found in the gabbro of the Eastern Lizard, Cornwall. An origin by gravitational settling of plagioclase and olivine crystals is proposed. Several post accumulation factors have obscured the lateral continuity of these features.Their present orientation suggests that the gabbro has been rotated through approximately 90° about an E—W axis and‘ tops’ to the N. This invalidates the idea of an in-situ ring intrusion but is in keeping with the ophiolite model for the Eastern Lizard.

Type
Articles
Information
Geological Magazine , Volume 115 , Issue 3 , May 1978 , pp. 199 - 204
Copyright
Copyright © Cambridge University Press 1978

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References

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