A Descriptive and Statistical Account of the British Empire; Exhibiting Its Extent, Physical Capacities, Population, Industry, and Civil and Religious Institutions Volume 1

A Descriptive and Statistical Account of the British Empire; Exhibiting Its Extent, Physical Capacities, Population, Industry, and Civil and Religious Institutions Volume 1

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1847 edition. Excerpt: ...granite. In the lower parts occur greywacke, old red sandstone, and limestone. Mr. Griffith regards part of this limestone as a different formation from that of the great central limestone district; it contains large orthoceratites, called by the inhabitants cows' horns. This may be described as the lower transition limestone. On the eastern part of the district the mountain limestone forms entire mountains of considerable elevation, and contains oolitic beds, which, however, are distinct from the regular oolitic formation, and of a more ancient epoch. The cliffs on the northern coast of Mayo are exceedingly precipitous, in parts overhanging the sea. The highest mountains vary in height from about 2,000 to 2,680 feet, the altitude of Muilrea, the highest in the district. The western coast of Mayo is, in parts, low, and covered by heaps of sand. The mineral treasures of this district have been almost entirely neglected; but it is known to contain ores of lead and zinc. According to a paper of Archdeacon Verschoyle, read to the Geological Society of London, there are 11 parallel basaltic or trap dykes intersecting the northern part of this district, in a north-east and south-west direction; they cut through all the rocks from gneiss to mountain limestone. One of these dykes he traced between 60 and 70 miles. Besides the five mountain districts which surround the midland counties, there are some small isolated districts, or patches of primary and transition rocks, situated within these counties, where the rocks of this class rise through the surrounding secondary formations, at a considerable distance from the coast. Indeed, there can be little doubt that the rocks which compose the primary and transition districts dip down and extend under the...show more

Product details

  • Paperback | 386 pages
  • 189 x 246 x 20mm | 685g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236598431
  • 9781236598431