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A note on sheath and core structure in the Mull pitchstones

Published online by Cambridge University Press:  01 May 2009

D. J. Drysdale
D. J. Drysdale
Affiliation:
Department of Geology and Mineralogy, University of Queensland, St Lucia, Queensland 4067, Australia
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Summary

Sheath and core structure results from secondary hydration and devitrification, initiated at relatively high temperatures during cooling, of the intrusive pitchstone sheets. Less than 0.5% of the water present is an original magma component.

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Type
Articles
Information
Geological Magazine , Volume 116 , Issue 2 , March 1979 , pp. 99 - 104
Copyright
Copyright © Cambridge University Press 1979

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