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A Note on the Composition of some Natural Acid Glasses

Published online by Cambridge University Press:  01 May 2009

Ian Carmichael
Ian Carmichael
Affiliation:
Department of Geology, Imperial College of Science, London, S. W. 7.
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Abstract

Pitchstones and obsidians from Arran, Eigg, and Iceland, are shown to have small but distinct differences in their major-and trace-element composition, and it is concluded that acid magma in the British Tertiary as represented by the pitchstones from Arran and Eigg maybe more variable in composition than that of the Icelandic subprovince. Fourteen new analyses are represented.

Type
Articles
Information
Geological Magazine , Volume 99 , Issue 3 , June 1962 , pp. 253 - 264
Copyright
Copyright © Cambridge University Press 1962

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References

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