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VI.—On Variolite and other Tachylytes at Dunmore Head, Co. Down

Published online by Cambridge University Press:  01 May 2009

Grenville A. J. Cole
Grenville A. J. Cole
Affiliation:
Professor of Geology in the Royal College of Science for Ireland.
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Extract

While examining the dykes along the coast of Mourne in the company of Mr. R. Welch, I came across an additional example of intrusive variolite, the occurrence of which seems worth recording. The mass is,inthis case, a thin one, about 20 centimetresinwidth, narrowing and dying out as it is traced northwards; it runs in a somewhat sinuous course along the strike of the uptilted strata. Every other dyke that I have seen upon this richly favoured coast cuts across the Ordovician beds, and the present instance to the contrary may be only a lateral sheet-like offshoot from one of the familiar basalts.

Type
Original Articles
Information
Geological Magazine , Volume 1 , Issue 5 , May 1894 , pp. 220 - 222
Copyright
Copyright © Cambridge University Press 1894

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References

page 220 note 1 Proc. Roy. Dublin Soc. vol. vii. (1892), p. 511.Google Scholar

page 220 note 2 “lehrbuch der Petrographie,” 2te Autiage (1894), 2te Band, , p. 704.Google Scholar

page 221 note 1 “Dykes appearing on the shore which skirts the Mourne Mountains.” Journ. Geol. Soc. Dublin, , vol. i. p. 182.Google Scholar