Report Upon United States Geographical Surveys West of the One Hundredth Meridian Volume 3

Report Upon United States Geographical Surveys West of the One Hundredth Meridian Volume 3

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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. 1881 edition. Excerpt: the Stonewall, described in a former chapter. The lowest sandstone exposed is evidently that which overlies the Lower Vermejo coal-bed. Ute Creek, heading in Old Baldy Mountain, enters the Cimarron at about twelve miles from Cimarron. It flows through Ute Valley, a pleasant little park eroded from the Colorado shales and the lower rocks of the Laramie group. Its northeastern wall is a bluff of Laramie sandstones, and the Baldy Mountains rise on the southwest side. At the base of Little Baldy the Laramie sandstones are dipping northeast at 30, but farther north these are covered by trachyte, of which dikes have been thrust out almost to Ute Creek. The valley is terraced and is littered with fragments of trachyte, of sandstones belonging to the Lower and Upper Cretaceous, and of metamorphosed shale from the Colorado group. A broad dike appears above the forks of the Ute Creek, but it is not shown in the park. It remains in sight along the road leading up the creek, until at a short distance below the old Aztec mill it is crossed by the road and soon after passes into Old Baldy. An exposure of Upper Dakota sandstone occurs near the forks of the creek, but the rise in the road is so much more rapid than that of the rocks that one soon comes to the Colorado shales, which remain in sight until the foot of Old Baldy is reached. On a ridge extending southeastward from Old Baldy several small dikes cut the Colorado shales. Some of these contain many fragments of gneiss, while in others there are fragments of a very silicious limestone or slightly calcareous sandstone, which are not unlike a bed seen in the Carboniferous farther west. The Colorado shales, as far as exposed here, vary from drab to darkbrown, and evidently belong to the base of No. more

Product details

  • Paperback | 150 pages
  • 189 x 246 x 8mm | 281g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236587928
  • 9781236587923