Report of a Reconnaissance of the Black Hills of Dakota; Made in the Summer of 1874

Report of a Reconnaissance of the Black Hills of Dakota; Made in the Summer of 1874

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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. 1875 edition. Excerpt: ...of the Red Beds it higher levels, and they would show everywhere more disturbance. They seem only to occupy a regular belt, surrounding the hills on all sides, never rising so as to be seen within the hills. I have no doubt but the hills have been elevated farther subset)tient to the Red Reds, but the shattered condition of the Carboniferous limestone and the underlying sandstone (July 24) is so complete, that it shows plainly that the Red Beds, if overlying, could not have escaped a similar breaking up. I have seen the former made up of limestone and sandstone in angular pieces of all sizes to G feet, thoroughly mixed, the whole stained red, overlain by the Red Beds, undisturbed beyond a gentle dip. All the other formations--those of the Cretaceous--are in this respect like the Red Beds. There must also have been a still earlier upheaval, throwing out the Devonian, unless that be represented in the great limestone formation. 1 have said the granite shows apparently an increasing redness toward the south. That is so; but I do not feel sure that it is not entirely dne to weathering and iron stains. To-day I have seen large white crystals of feldspar in the rock, the same as at points farther north, and, at the same time, near by, the ground appeared red from red feldspar-gravel from the disintegration of the rock. Camp, August 4.--We are about six miles from the general camp, in the midst of large pines5 on a small creek, which is shut in by high hills of schist. August 5.--Reached camp after traveling about two hours, at 9.30 a. m. The reconnaissance toward the south, accompanied by Colonel Lndlow, took one day less time, and arrived back to-day about two hours later than we. 7 H BETURN n--FROM CUSTER...show more

Product details

  • Paperback | 64 pages
  • 189 x 246 x 3mm | 132g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236579615
  • 9781236579614