Geology for the Millions

Geology for the Millions

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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. 1863 edition. Excerpt: ...of Devon, forming the picturesque cliffs of Dawlish, and the adjacent coast line, through which the railway trains play at hide-and-seek. The same rocks occur in patches on the Western coasts and islands of Scotland, and on the opposite coast of Ireland. It is more fully developed in the Alps in Eastern France, and in Germany, as also in the United States and Central Africa. The best land upon this formation for farm culture is situated in the vales of Taunton and Exeter, whilst the soil lying over the sandstones of Warwick and Nottingham is of little value. These sandstones, though soft when taken from the quarry, harden by exposure to the atmosphere, and form a fair building material in the districts where they occur. CHAPTER VII. LIAS SYSTEM. "For is it not true, In yon limestone blue, On the mountain steep, In the valley deep, Are the skeletons of the dead?" Crichton. Beds of mud deposited in horizontal layers, from which term the name Lias is supposed to be derived, characterize this stratum, the lowest member of the great Oolitic group. The ocean currents of these comparatively quiet seas, washed trunks of trees from distant islands, and to them were attached clusters of Crinoids, as we see barnacles clinging at the present day. These were of the species with five-sided pillars, called Pentacrinites, the bead-like joints of the column almost resembling stars pierced in the centre, while from the cup stony arms stretched in every direction, and thus the driftwood bore onwards in the current multitudes of stony scavengers, collecting the putrescent matter from the waters. Bivalves related to our oysters peopled this sea, leaving their remains in large beds. Brachiopods lived anchored to the submerged rocks; fishes in mailed armour...show more

Product details

  • Paperback | 32 pages
  • 189 x 246 x 2mm | 77g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236604210
  • 9781236604217