Palaeontographical Society Monographs Volume 36, Nos. 168-173

Palaeontographical Society Monographs Volume 36, Nos. 168-173

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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. 1882 edition. Excerpt: ...thickness, has a development much in excess of the Wenlock Shale in the Malvern district, where Professor Phillips estimated it to be 640 feet thick; indeed, its thickness in Shropshire is greater than in any other district, unless we except its supposed equivalents, the Denbighshire Flags, which I believe will be found to belong to a distinctly lower horizon. " T/re Ludlow Serz'es.--Any definite estimate of the relative thicknesses of the several members of the Ludlow Beds is difficult to arrive at, as at the eastern extremity of the Shropshire escarpment the Aymestry horizon is ill-defined, here and there represented by isolated thin bands of limestone, and again as thick masses of impure concretionary limestone intermixed with shale. Collectively the Ludlow series attains a thickness of from 1200 to 1400 feet, which the Aymestry band divides nearly equally; the Lower Ludlow being a little thicker than the Upper, and consisting of softer shales. The Upper Ludlow Beds, as at Burton, near Wenlock, often assume the character of fissile tilestones. The Lower Ludlow Beds are exposed in cuttings of the Wenlock Railway between Wenlock and Presthope, and the very base of these beds is seen in the Wenlock Railway east of Wenlock. The equivalent of the Aymestry Limestone is finely exposed in the road-cutting below the Dunge House, near Broseley, and to the west of the Marsh Farm on the high road between Broseley and Much Wenlock. The Upper Ludlow is to be seen by the roadside at Burton, near Wenlock, and is also exposed in Willey Park, and in the bottom of the valley below the Dean Farm, near Broseley. " The beds connecting the Upper Ludlow with the Old Red Sandstone, which are well exposed on the banks of a little stream known as...show more

Product details

  • Paperback | 154 pages
  • 189 x 246 x 8mm | 286g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236831241
  • 9781236831248