Memoirs of the Geological Survey of Great Britain, and of the Museum of Practical Geology in London Volume 1-2

Memoirs of the Geological Survey of Great Britain, and of the Museum of Practical Geology in London Volume 1-2

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1848 edition. Excerpt: ...Y has to its branches. In the narrow dome of May Hill, directed N.N.W., we recognize the ramification toward the wider dome of Woolhope; and in the undulations near Huntley, Blackhouse, and Clifford's Mine, and in the general truncation of the Silurian strata against the Red marls and Red sandstones-we perceive analogies to the many anticlinals and synclinals, and abrupt eastern edges of Malvern. The indifference, if we may so say, with which the various members of the Palaeozoic strata are presented to the Mesozoic marls and sandstones, is not less remarkable here than on the eastern side of the ranges of North Malvern and Abberley. On the western side, the Silurian strata are, at least approximately, in conformity with the Old Red, and their boundary line is simple; but on the east, the Old Red is thrown into abrupt opposition to the Caradoc sandstone in Newent Wood (owing to a long fault from Aston Ingham toward Huntley), and the whole eastern boundary of the Palaeozoic strata offers sinuosities and truncations, such as a complication of disturbing movements, followed by strong watery action, might produce. Undoubtedly the strata of the May Hill district were deposited on the Palaeozoic sea bed continuously with those of Woolhope and Malvern, and the upheaval and disruption which all these districts have experienced, were accomplished during one geological period, and by one system of physical forces. TORTWORTH DISTRICT. As already observed (p. 18), the Silurian region of May Hill contracts in breadth, and diminishes in height in its course southward, till at Flaxley only a thin ridge of Wenlock limestone appears, acuminated to a point, between the approaching surfaces of Old and New Red. The Old Red, dipping steeply to the west, or...show more

Product details

  • Paperback | 150 pages
  • 189 x 246 x 8mm | 281g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236864808
  • 9781236864802