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The Traprain Law Phonolite

Published online by Cambridge University Press:  01 May 2009

A. G. MacGregor
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Extract

Are-examination of the trachytoid phonolite of Traprain Law was undertaken on the suggestion of Mr. E. B. Bailey, in order to determine the characteristics and mode of occurrence of the nepheline contained in it. The slides examined were those of the Geological Survey collection and nine new ones specially cut from material recently obtained. During the course of the examination sodalite and olivine were detected in the rock. These minerals have not been mentioned in previous accounts of the petrography of Traprain Law, and sodalite seems to have been described in only one other rock from the British Isles (14).

Type
Original Articles
Information
Geological Magazine , Volume 59 , Issue 11 , November 1922 , pp. 514 - 523
Copyright
Copyright © Cambridge University Press 1922

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References

BIBLIOGRAPHY

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