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III.—The Culm-measures of the Exeter District

Published online by Cambridge University Press:  01 May 2009

E. A. Newell Arber
E. A. Newell Arber
Affiliation:
Trinity College, Cambridge.
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Extract

In the interesting paper, by Mr. F. G. Collins, on the so-called Culm-measures of the Exeter district, which has recently appeared in the last number of the Quarterly Journal, there are to be found certain conclusions which can hardly pass unchallenged. When this paper was read at the Geological Society, I happened to be in the extreme west of Ireland, and thus, unfortunately, I was unable to be present at that meeting or to take part in the discussion. In fact, it was not until my return to Cambridge in September that I knew anything of the substance of the paper, beyond the very small contribution on the fossil plants which I wrote for it some time ago.

Type
Original Articles
Information
Geological Magazine , Volume 8 , Issue 11 , November 1911 , pp. 495 - 497
Copyright
Copyright © Cambridge University Press 1911

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References

page 495 note 1 Quart. Journ. Geol. Soc, vol. lxvii, pt. iii, p. 393, 1911Google Scholar.

page 495 note 2 Ibid., pp. 411, 413.

page 496 note 1 Sedgwick, & Murchison, , Trans. Geol. Soc, ser. II, vol. v, pp. 682, 684, 1840Google Scholar.

page 496 note 2 Arber, Phil. Trans. Eoy. Soc. London, ser. B, vol. cxcvii, p. 291, 1904Google Scholar.

page 496 note 3 The term ‘Culm’, as used by Mr. Collins in the title of his paper, is even more objectionable. It is an old West of England word for the slack of an anthracitic coal. As used by geologists, it is apparently a translation of the German ‘Kulm’, which itself originated on the Continent under a misconception of the nature of the Culm-measures of Sedgwick & Murchison in Devon and Cornwall.

page 496 note 4 Hinde & Fox, Quart. Journ. Geol. Soc, vol. li, p. 609, pl. xxiii, 1895Google Scholar.

page 496 note 5 Ussher, Trans. Inst. Min. Engineers, vol. xx, p. 360, pi. xvi, 1901Google Scholar.

page 496 note 6 Ussher, The Geology of the Country around Exeter (Mem. Geol. Surv.),. ch. ii, 1902Google Scholar.

page 497 note 1 I have, for reasons stated in my previous papers on Devonshire, adopted the twofold classification of the Culm-measures initiated by Sedgwick & Murchison, in preference to the threefold scheme of Mr. Ussher, whose ‘Middle’ and ‘Upper’ are included in my Upper Culm-measures.