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V.—Note on Mr. Goodchild's Theory of the Sub-Glacial Formation of Gravels
Published online by Cambridge University Press: 01 May 2009
Extract
In the paper on “Drift” in the Geological Magazine for November, 1874, Mr. Goodchild, in proposing his new theory, appears to invite discussion on it. I therefore beg to contribute my quota towards upholding the marine, as against the exclusively glacial, deposition of certain gravels belonging to the Drift.
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References
page 172 note 1 On Drift, by J. G. Goodchild, F.G.S.
page 172 note 2 Loc. cit. p. 510.
page 172 note 3 In a few places patches of Boulder-clay (Upper Boulder-clay) resting on the sands and grayels occur in the district with which I am acquainted.
page 173 note 1 Geological Report on Londonderry, etc., pp. 747–8.
page 173 note 2 There is evidence that the general Physical Geology of this district just before the Glacial Epoch was not very different from that which prevails there at the present day. This I have given in a paper read at the late meeting of the British Association at Belfast, “On the Age and Mode of Formation of Lough Neagh.”
page 174 note 1 Op. Cit. p. 737.
page 174 note 1 In the gravels of Carlow I have found shell fragments; in one near the town, I got two perfect shells. One a Purpura lapillus, the other a small bivalve which I have not been able to identify with certainty, but it appears to be Tellina solidula.