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The old or Grey Granite of the Transvaal and Orange River Colony

Published online by Cambridge University Press:  01 May 2009

C. G. S. Sandberg
Affiliation:
Haarlem, Holland
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Sir,—On May 13 of this year a paper was read in the Geological Society of London by F. W. Penny, B.Sc, F.G.S., “On the Relationship of the Vredefort Granite to the Witwatersrand System” (see Geol. Mag., July, 1914, pp. 332–3), wherein the writer suggests “that the Vredefort Granite, instead of being ‘Archæan’, is of a post-Pretoria – pre-Karroo age, if not contemporaneous with, at least connected with, the same epoch of igneous activity as the ‘Red Granite’ of the Northern Transvaal”.

Type
Correspondence
Copyright
Copyright © Cambridge University Press 1914