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XIX.—Tuesite—A Scotch Variety of Halloysite

Published online by Cambridge University Press:  15 September 2014

J. W. Gregory
J. W. Gregory
Affiliation:
University of Glasgow
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Extract

The absence of china clay from Scotland has been used as a weighty argument in favour of the pneumatolytic or deep-seated origin of the great china clay masses of Cornwall and Devonshire, of southern Sweden, and of some of those in Germany. Kaolin, which is often regarded—I think correctly—as a synonym of china clay, and kaolinite, have, however, been occasionally recorded as occurring in Scotland. A reported occurrence at Troon may be easily dismissed. Thus it is only recorded doubtfully, with the remark that its composition has not been determined, by J. Sommerville and G. R. Thompson, while John Smith describes it as a bed of finegrained volcanic dust deposited in water. Kaolinite has been recorded by Heddle from several Scottish localities; thus it is found in minute crystals in Shetland, and in a vein at the head of Glen Capel at Abington, Lanarkshire.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 30 , 1910 , pp. 361 - 363
Copyright
Copyright © Royal Society of Edinburgh 1910

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References

page 361 note * Natural History of Glasgow and West of Scotland, Brit. Assoc. Handbook, 1901, p. 552.

page 361 note † Smith, J., “The ‘China Clay’ Mine and the Water of Ayr Hornstone Bed at Troon, Ayrshire,” Trans. Geol. Soc. Glasgow, vol. xi., 1900, p. 238.CrossRefGoogle Scholar

page 361 note ‡ Heddle, M. F., Mineralogy of Scotland, vol. ii., 1901, p. 148.Google Scholar

page 361 note § Thomson, T., Outlines of Mineralogy, 1836, vol. i. p. 244.Google Scholar

page 362 note * Milne, D. [Home], “A Geological Survey of Berwickshire,” Prize Essays and Trans. Highland and Agricultural Soc. Scotland, new series, vol. v., 1837, pp. 206–211.Google Scholar

page 362 note † Hintze, , Handbuch der Mineralogie, voi. ii., 1897, p. 840.Google Scholar

page 362 note ‡ Dana, , System of Mineralogy, 6th edit., 1892, p. 685.Google Scholar

page 362 note § H. W. Bristow, A Glossary of Mineralogy, p. 389.

page 363 note * Dufrénoy, A., Traité de Minéralogie, 2nd edit., vol. iii., 1866, p. 585.Google Scholar

page 363 note † Nicol, J., Manual of Mineralogy, 1849, p. 222 Google Scholar; Elements of Mineralogy, 1858, p. 170. Dana, on the other hand (System of Mineralogy, 6th edit., p. 685), calls Tuesite a lithomarge, and it is included by Greg and Lettsom in kaolin or as closely allied to kaolin, lithomarge, and halloysite ( Greg, and Lettsom, , Manual of Mineralogy of Great Britain and Ireland, 1858 pp. 207, 448Google Scholar).