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XXV.—The Petrology of South Georgia.

Published online by Cambridge University Press:  06 July 2012

G. W. Tyrrell
G. W. Tyrrell
Affiliation:
Lecturer in Mineralogy and Petrology, University of Glasgow.
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Extract

The first petrographic description of the rocks of South Georgia was given by H. Thürach in 1890, as part of the results of the German Scientific Expedition to that area of 1882–83. He described the rocks as clay-slates interstratified with phyllite and phyllite-gneiss, with quartz-phyllite, calc-phyllite, and quartzite-slate. He also mentions a great development of interbedded schalsteine or diabase tuffs, and describes a rolled pebble of “korniger gneiss.” His phyllite-gneiss is said to contain tourmaline, apatite, and andalusite. He emphasises the great crushing and disturbance the rocks have undergone.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 50 , Issue 4 , 1916 , pp. 823 - 836
Copyright
Copyright © Royal Society of Edinburgh 1916

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References

page 823 note * “Geognostische Beschreibung der Insel Süd-Georgien,” Intern. Polarforschung, 1882–3: Die deutsche Exped., vol. ii, 1890, pp. 109–166.

page 823 note † “Petr. Unters. a. d. Westantarctischen Geb.,” Bull Geol. Inst. Upsala, vol. vi, 1900, pp. 234–46.

page 823 note ‡ “Geologische Beobachtungen über Süd-Georgien,” Zeitsch. Ges. Erdkunde, Berlin, April 1912.

page 827 note * Dixon, and Vaughan, , “The Carboniferous Succession in Gower,” Quart. Journ. Geol. Soc., lxvii, 1911, p. 520.Google Scholar

page 829 note * Mineralogical Magazine, viii, 1889, 186–98.

page 829 note † I am indebted to A. Fleck, B.SC., of the Radiometric Laboratory, Glasgow University, for carrying out this test.

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page 833 note † Die Schwedisch Sud-Polar Exped. und Ihre Geographische Tatigkeit, 1911, pp. 211–13.

page 833 note ‡ Die Schwedisch Sud-Polar Exped. und Ihre Geographische Tatigkeit p. 212.

page 833 note § Die Schwedisch Sud-Polar Exped. und Ihre Geographische Tatigkeit

page 833 note ║ Pirie, J. H., “On the Graptolite-bearing Rocks of the South Orkneys,” Proc. Roy. Soc. Edin., xxv, 1905, pp. 463–70.Google Scholar

page 833 note ¶ Nordenskjöld, O., “Petr. Unters. a. d. Westantarctischen Gebiete,” Bull. Geol. Inst. Upsala, vi, 2 (1900), pp. 234–40Google Scholar; also see “Antarctis,” Handbuch der Regionalen Geologie, Band viii, 6, pp. 5–9.

page 834 note * Gregory, J. W., “The Geological Relations of South Georgia,” Geol. Mag., Feb. 1914, p. 64.Google Scholar

page 834 note † SirGeikie, A., “Notes on Rock Specimens from the Antarctic Regions” (with petrographic notes Dr J. J. H. Teall), Proc. Roy. Soc. Edin., xxii, 1898, pp. 66–70.Google Scholar

page 834 note ‡ Loc. cit., p. 64.