Abstract
Geological Society, June 22. —Mr. Joseph Prestwich, F.R.S., president; in the chair Mr. Horace Pearce, 21; Hagley Road, Stourbridge, and Mr. Samuel Spruce, of Tamworth; were elected Fellows of the Society. I. “Notes on the Lower portion of the Green-slates and Porphyries of the Lake District between Ulleswater and Keswick.” By Dr. H. Alleyne Nicholson, F.R.S.E., F.G.S., lecturer on Natural History in the Medical School of Edinburgh. The author describes the characters presented by the lower part of that series of rocks, named by Professor Sedgwick the “Green-slates and Porphyries,” which overlie the Skiddaw Slates in the Lake District. He notices the sections of this series in Borrowdale, on the east side of Derwentwater; between Keswick and the Vale of St. John, in the Vale of St. John, in Matterdale, in Eycott Hill, between Ulleswater and Haweswater, and in the neighbourhood of Shap. In the Borrowdale section the sequence of the rocks is given by the author as follows:— Resting on the Skiddaw slates there are (1) a felspathic trap; (2) a great series of ashes, breccias, and amygdaloids; often showing slaty cleavage and worked as slates, but with several intercalated bands of trap; and (3) a second trap. This appears to be a normal section, and is repeated, but diversified by the results of folding and faults in the other lacalities described by the author, except that in the Vale of St. John the true slaty series seems to be entirely Wanting.
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Societies and Academies. Nature 2, 245–248 (1870). https://doi.org/10.1038/002245a0
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DOI: https://doi.org/10.1038/002245a0