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Contemporaneous Volcanic Activity in East Fife

Published online by Cambridge University Press:  01 May 2009

David Balsillie
David Balsillie
Affiliation:
Royal Scottish Museum.
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Extract

In a previous contribution to the Geological Magazine the opinion was put forward, based upon an examination of field evidence available in the neighbourhood of Largo, that the assumption of a Permian age for the old volcanoes of East Fife should no longer be sustained. It will be remembered by those interested in the matter, that whereas this district afforded remarkably clear evidence of contemporaneous volcanic action during Lower Carboniferous times, no confirmation was forthcoming of Sir A. Geikie's wholly different structural interpretation of an overlying unconformable sheet of post-Carboniferous ash. The purpose of this paper is to supplement the conclusions arrived at three years ago, and to note one or two additional field exposures that seem likewise to indicate contemporary eruptive activity among the Lower Carboniferous rocks of East Fife.

Type
Original Articles
Information
Geological Magazine , Volume 64 , Issue 11 , November 1927 , pp. 481 - 494
Copyright
Copyright © Cambridge University Press 1927

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References

page 481 note 1 Vol. LX, 1923, p. 530.

page 488 note 1 “The Geology of East Lothian” Mem. Geol. Surv. Scot.Google Scholar

page 489 note 1 I have lately found that the garnets from Elie, assembled by Professor Heddle, in the Scottish Mineral Collection, under the head “Elie Ruby”, or Pyrope, fall into two distinct groups. The members of one of these are rather deeply wine coloured, have an index of refraction < 1·75, and exhibit no distinct absorption spectrum. Those of the other group are definitely higher in refractive index (> 1·75), have a decidedly purple tint, and an absorption spectrum qualitatively similar to almandine. A like variation in optical properties has been determined among the garnets of Kimberley, Jagersfontein, etc.—D. B.

page 490 note 1 Canada, Dept. of Mines, Geol. Surv. Mems., Nos. 6 and 57: “Geology of the Haliburton and Bancroft Areas of the Province of Ontario,” p. 227, and “Corundum, Its Occurrence, Distribution, Exploitation, and Uses”, 57.

page 492 note 1 Geol. Mag., Vol. LXI, 1924, p. 142.Google Scholar

page 492 note 2 Geol. Mag., Vol. LX, 1923, p. 249.Google Scholar

page 492 note 3 “The Geology of the Glasgow District”: Mem. Geol. Surv. Scot., Revised Edition, 1925, p. 151.Google Scholar

page 493 note 1 Ibid., p. 151.