Congressional Edition Volume 5459

Congressional Edition Volume 5459

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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. 1909 edition. Excerpt: ...graywackes, and limestones parallel to the coast of the Bay of Fundy, but there is a group of more schistose rocks containing no organic remains which dip toward this ridge. These latter are evidently Primary, while the graywackes and graywacke slates are Cambrian or Silurian." It is certain that a part of the granitic and syenitic rocks which have been regarded as Primary really belong to a later age. Gesner, in 1842, finds that the graywackes and slates provisionally correlated with the Cambrian were deposited prior to the elevation of the granitic, syenitic, and trappean masses upon which they rest, as they are fractured in all directions by dikes and extensive elevations of those rocks. Gesner,5 in 1843, places the granite, syenite, trap, and serpentine in the unstratified rocks. To the Cambrian system are referred a series of graywackes and clay slates which are sometimes conglomeratic. These rocks extend from the American boundary nearly to Bathurst, and in them organic remains occur. Johnston,0 in 18.r0, in a report on the Province of New Brunswick, gives a map by Robb in which the crystalhne rocks are outlined as granite, gneiss, mica slate, and trap rocks. Bailey, Matthew, and Iiartt,7 in 1805, in observations on the geology of southern New Brunswick, give a resum of the work previously done. Of the fifteen different groups of 7'ocks, the lowest consists principally of granite, gneiss, mica schist, and thick beds of crystalline limestone. This is the Laurentian or Portland group. Resting upon the Portland group is the Coldbrook group, belonging to the Huronian division of the Azoic system, also thick deposits of altered slate of a volcanic character, surmounted by conglomerates. The Coldbrook group is succeeded by the St. John...show more

Product details

  • Paperback | 466 pages
  • 189 x 246 x 24mm | 826g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236655745
  • 9781236655745