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- W2134716009 abstract "I. Introduction. A paper which was read to this Society on December 9th, 1891, had for its primary object the proof that certain felsites, occurring in North-west Caernarvonshire, which had been claimed to be of pre-Cambrian age, were in reality part of the Cambrian succession. This conclusion had indeed been previously arrived at in an earlier paper, <sup>∼</sup> and had been confirmed by Sir Archibald Geikie in his Presidential Address but further proofs were brought forward from a study (1) of the Cambrian succession, (2) of the felsite itself. The latter part of the paper, however, with its somewhat startling assertion of the ‘ post-Cambrian ’ age of certain conglomerates which had hitherto been considered either to mark the base of the Cambrian or to be an integral portion of it, required perhaps, considering the weight of authority to which the statements were opposed, somewhat more argumentation than was there given to it. Since the date of that paper further information has been obtained, which, while it has necessitated some minor corrections, is found in the end to greatly strengthen the main contention. With regard to the felsite, or, as one ought properly to say, the felsites, in spite of Dr. Hicks9s latest assertion that ‘there is abundant evidence to show that the Llyn Padarn quartz-felsite is of pre-Cambrian age,’ it seems to me like flogging a dead horse to prove any further their Cambrian age. They occur, as will be seen, at so many horizons that they could only" @default.
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- W2134716009 date "1893-02-01" @default.
- W2134716009 modified "2023-09-26" @default.
- W2134716009 title "On the Felsites and Conglomerates between Bethesda and Llanllyfni, North Wales" @default.
- W2134716009 doi "https://doi.org/10.1144/gsl.jgs.1893.049.01-04.58" @default.
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