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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
Affiliation:
Department of Geology and Mineralogy, University of Queensland, St Lucia, Queensland 4067, Australia

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.

Type
Articles
Copyright
Copyright © Cambridge University Press 1979

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