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The Age Relationship of the Granophyre and Basalt of Orval, Isle of Rhum

Published online by Cambridge University Press:  01 May 2009

George P. Black
George P. Black
Affiliation:
Grant Institute of Geology, University of Edinburgh.
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Abstract

On Orval, in the Isle of Rhum, Tertiary plateau lavas directly overlie the granophyre of the ring-complex. Judd considered that the Orval basalts rest unconformably upon an old land surface cut in the granophyre; but on the supposed existence of veining and metamorphism later workers, in particular Geikie and Harker, concluded that the granophyre had intruded the volcanic pile. The author's re-examination of the Orval rocks supports Judd's early interpretation.

Type
Articles
Information
Geological Magazine , Volume 89 , Issue 2 , April 1952 , pp. 106 - 112
Copyright
Copyright © Cambridge University Press 1952

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References

REFERENCES

Bailey, E. B., 1944. The Tertiary Igneous Tectonics of Rhum, Inner Hebrides. Quart. Journ. Geol. Soc., c, 165–188.CrossRefGoogle Scholar
Geikie, A., 1897. The Ancient Volcanoes of Great Britain. Macmillan and Co.CrossRefGoogle Scholar
Harker, A., 1908. The Small Isles of Inverness-shire. Mem. Geol. Survey.Google Scholar
Judd, J. W., 1874. The Secondary Rocks of Scotland. Quart. Journ. Geol. Soc., xxx, 220–302.CrossRefGoogle Scholar
Tomkeieff, S. I., 1942. The Tertiary Lavas of Rum. Geol. Mag., lxxix, 1–13.CrossRefGoogle Scholar