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Triassic and Pleistocene Surfaces on some Leicestershire Igneous Rocks

Published online by Cambridge University Press:  01 May 2009

Frank Raw
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Extract

The ancient rocks of Leicestershire may be taken to comprise the pre-Cambrian volcanic and sedimentary rocks of Charnwood Forest, and the igneous rocks intrusive into them, viz. the dacite-porphyrites of Bardon Hill, Peldar, and High Sharpley, etc., the granophyric diorites and porphyrites within and south-west of the Forest and in South Leicestershire, and the Mountsorrel granite or granodiorite. There is reason to believe that all except the last are pre-Cambrian in age: for the last a post-Silurian age seems most probable. These ancient rocks are now exposed through the removal of the Keuper Marl, whichhad largely if not completely buried them. In glacial times, however, small areas have been reburied under glacial deposits.

Type
Original Articles
Information
Geological Magazine , Volume 71 , Issue 1 , January 1934 , pp. 23 - 31
Copyright
Copyright © Cambridge University Press 1934

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References

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2 Bosworth, T. O., “The Keuper Marls around Charnwood,” Leices. Lit. and Phil. Soc., 1912, 38; also “The Keuper Marls around Charnwood,” Quart. Journ. Geol. Soc., lxviii, 1912, 283.Google Scholar

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6 Bosworth, T. O., “The Keuper Marls around Charnwood,” Leices. Lit. and Phil Soc., 1912, 28, fig. 16; 41, fig. 25; 21, 34, fig. 21; 29, 33; also Quart. Journ. Geol. Soc., 1912, 282, 284, and fig. 1.Google Scholar

7 Raw, F., “On the Occurrence of a Wind-worn Rock Surface at Lilleshall Hill, Salop, etc.,” Brit. Assoc. Rep. for 1913, 493; or Geol. Mag., 1913, 523.Google Scholar

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9 This was associated with exfoliation, which had followed the main sandblasting, and had been followed by a repetition of the same. They were, however, perfectly clean and devoid of red stain, Perhaps the exfoliation was due to frost, rather than sun.Google Scholar

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