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A Columnar Crystallization of Olivine and Plagioclase

Published online by Cambridge University Press:  01 May 2009

J. Preston
J. Preston
Affiliation:
Department of Geology, The Queen's University, Belfast.
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Abstract

A thin vein of dolerite at Slemish, Co. Antrim, shows an unusual plane and smooth contact against the dolerite of a Tertiary plug. A columnar growth at the contact indicates special conditions for crystallization. The selvedge is described and an attempt made to explain the growth and orientation of the olivine.

Type
Articles
Information
Geological Magazine , Volume 100 , Issue 1 , February 1963 , pp. 1 - 6
Copyright
Copyright © Cambridge University Press 1963

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References

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