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III.—The Application of Petrological and Quantitative Methods to Stratigraphy

Published online by Cambridge University Press:  01 May 2009

P. G. H. Boswell
P. G. H. Boswell
Affiliation:
Imperial College, London, S.W.
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Extract

On account of the aid it has given, palæontology has been termed the handmaiden of stratigraphy, but up to the present time petrology has not been called upon, so far as it might have been, to fulfil its appropriate duty towards the elucidation of the problems of stratigraphical geology and palæogeography.

Type
Original Articles
Information
Geological Magazine , Volume 3 , Issue 3 , March 1916 , pp. 105 - 111
Copyright
Copyright © Cambridge University Press 1916

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References

page 107 note 1 Scrivenor, J. B., Min. Mag., vol. xiii, p. 348, 1903;Google ScholarThomas, H. H., Q.J.G.S., vol. lxv, p. 232, 1909;Google ScholarSmellie, W. R., Trans. Geol. Soc. Glasgow, vol. xiv, p. 267, 1911–1912.Google Scholar

page 107 note 2 Economic Geology, vol. vii, p. 697, etc., 1912.Google Scholar

page 107 note 3 Hatch, & Rastall, , Sedimentary Rocks (London, 1913); Appendix by T. Crook, p. 350.Google Scholar

page 109 note 1 Richards, R. H., Ore-Dressing, 1906, tables in Appendix.Google Scholar

page 109 note 2 Exclusive of such local sands, etc., such as those bordering the granite masses of Devon and Cornwall. These sands may be full of tourmaline, etc.

page 109 note 3 See, for example, the recently published Professional Paper 86, U.S.G.S., “The Transportation of Débris by Running Water” (G. K. Gilbert).

page 110 note 1 Since the above was written Professor W. G. Fearnsides has read a paper before the British Association upon the Underground Contours of the Barnsley Seam (Geol. Mag., October, 1915, p. 465). See also “The Use of Thickness Contours in the Valuation of Lenticular Coal Beds” (Rogers, G. S. and Lesher, C. E.): Econ. Geology, vol. ix, p. 707, 1914.CrossRefGoogle Scholar

page 110 note 2 Professor E. Hull used the term isodiametric (or isometric) lines, as those joining points of equal thickness of a formation before denudation had acted upon it. See Q.J.G.S., vol. xviii, p. 127, 1862.Google Scholar

page 110 note 3 C. S. Slichter, “Motions of Underground Water”: Water Supply and Irrigation Papers, No. 62, U.S.G.S. Hazen's ‘Uniformity Coefficient’ obtained by sifting is not satisfactory, and is applicable only to coarse deposits.