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Notes on the Geology of Sule Stack, Orkney

Published online by Cambridge University Press:  01 May 2009

Malcolm Stewart
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Extract

Sule Stack is composed of an orthogneiss traversed by shatter belts and small pegmatite veins composed of microcline and quartz. The chief constituent minerals of the gneiss are oligoclase and orthoclase felspars, hornblende altering towards chlorite, augite, and apatite. In addition some sections show magnetite and a few quartz. Comparisons are made between the gneiss of Sule Stack and that of the neighbouring island of Sule Skerry.

Type
Original Articles
Information
Geological Magazine , Volume 75 , Issue 3 , March 1938 , pp. 135 - 140
Copyright
Copyright © Cambridge University Press 1938

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References

REFERENCES

(1)Bedford, , Duchess of. “Spring Bird Notes from Various Scottish Islands,“ The Annals of Scottish Natural History, 1914, pp. 179–180.Google Scholar
(2)Buckley, T. E., and Harvie-Brown, J. A., A Vertebrate Fauna of the Orkney Islands, 8vo, Edin., 1891, p. 47.Google Scholar
(3)Gurney, J. H., The Gannet; a bird with a history. 8vo, London, 1913, pp. 157–164.Google Scholar
(4)Gurney, J. H., “The Gannetry of ‘The Stack’, Orkney Islands,” The Ibis, 1914, pp. 631–4.Google Scholar
(5)Stewart, Malcolm., “Notes on the Gannetries of Sule Stack and Sula Sgeir,” British Birds, xxxi, 1938, 282–94.Google Scholar
(6)Stewart, Malcolm., “Notes on the Geology of Sula Sgeir and the Flannan Islands,” Geol. Mag., LXX, 1933, 110–16.Google Scholar
(7)Walker, Frederick., “The Geology of Skerryvore, Dubh Artach and Sule Skerry,” Geol. Mag., LXVIII, 1931, 320–3.Google Scholar