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Four “Felstone” Intrusions in Central Berwickshire

Published online by Cambridge University Press:  01 May 2009

John Irving
John Irving
Affiliation:
Trinity College, Cambridge, Carnegie Research Fellow.
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Extract

The three masses of Dirrington Great Law, Dirrington Little Law, and Blacksmill Hill consist of riebeckite felsite, closely allied to the rock of the neighbouring Eildon Hills and most probably contemporaneous with it, i.e. they are of a Carboniferous age. They may represent the denuded remains of a laccolith which has been intruded into upper Old Red Sandstone conglomerates. The fourth mass forming Kyleshill is an orthophyre, with which is associated an andesite. The relations of these two rocks are obscure, and they may, or may not be, of the same age as the other three masses.

Type
Original Articles
Information
Geological Magazine , Volume 67 , Issue 12 , December 1930 , pp. 529 - 541
Copyright
Copyright © Cambridge University Press 1930

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References

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