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Note on the Nature and Age of Scottish Rocks bearing Xenocrysts of Anorthoclase or Soda-microcline

Published online by Cambridge University Press:  01 May 2009

V. A. Eyles
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Extract

In a recent paper on the age of the East Fife volcanoes, Mr. Balsillie has laid stress on the occurrence of xenocrysts of soda-microcline in various ashes and agglomerates in East Fife. These Fifeshire occurrences are well known, but it may be of interest to draw attention to the fact that xenocrysts of similar composition have been encountered in at least two other Scottish localities.

Type
Original Articles
Information
Geological Magazine , Volume 61 , Issue 10 , October 1924 , pp. 471 - 472
Copyright
Copyright © Cambridge University Press 1924

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References

1 Mr. Eltringham has since discovered a further specimen of Camptopkyllia eltringhami which, if it can be satisfa torily developed (it is in an exceedingly refractory nodula), promises to reveal much of the structure that is wanting in the example here figured.

2 Balsillie, D., “Further Observations on the Volcanic Geology of East Fife”: Geol. Mag., Vol. LX, 1923, p. 540.Google Scholar

3 Flett, J. S., “The Geology of the Country near Oban and Dalmally” Explanation of Sheet 45): Mem. Geol. Surv. Scotland, 1908, p. 127.Google Scholar

1 Tyrrell, G. W., “The Igneous Geology of the Ayrshire Coast from Doonfoot to the Heads of Ayr”: Trans. Geol. Soc. Glasgow, vol. xvi, pt. iii, 1917–1918, p. 359.Google Scholar