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Magmatic and Amygdaloidal Plagioclases

Published online by Cambridge University Press:  01 May 2009

M. J. Le Bas
M. J. Le Bas
Affiliation:
Department of Mineralogy and Petrology, Cambridge.
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Abstract

Thermal metamorphism of zeolites in amygdales of basaltic rocks is shown to give glomero-porphyroblastic aggregates of plagioclase crystals. Plagioclase phenocrysts in basic rocks are shown to undergo but little change during similar degrees of metamorphism.

Type
Articles
Information
Geological Magazine , Volume 92 , Issue 4 , August 1955 , pp. 291 - 296
Copyright
Copyright © Cambridge University Press 1955

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References

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