Bulletin Volume 245-250

Bulletin Volume 245-250

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ...limestones and graphitic phases and by occasional quartzites. Micaceous schists are the prevailing ones, but with them appear siliceous and graphitic variations, more, rarely feldspathic, amphibolitic, and granetiferous types. The presence of intruded greenstone is very much less common than is the case in the western portion of the peninsula, w-here the structural relations are easily recognized and the metaniorphism has not, in the majority of cases, been so great as to destroy the original features of the rocks. In passing eastward from the Kugruk River region, one notes a transition from the massive limestones forming the north-south ridge in which Harris Dome stands, through limestones of a schistose character and calcareous schists, to the mica-schists in the neighborhood a Mendenhall, Walter C, Reconnaissance from Fort Hamlin to Kotzebue Sound, Alaska: Prof. Paper U. S. Geol. Survey No. 10, 1902, pp. 3D-36. A "SCHIST MONUMENTS/' 10 MILES NORTH OF KIWALIK MOUNTAIN, DUE TO WEATHERING. of Eldorado Creek. These schists are frequently graphitic and often calcareous. In the vicinity of Hannum Creek banded slates are seen, and on Piimell River many quartzose beds occur, with an occasional heavy bed of quartzite. Schists with a silvery luster and satin-like feel are common in the vicinity of Candle Creek. Garnetiferous varieties are less common in the western and central part of the district than in the northern. Highly siliceous or quartzose schists cover a considerable area between Midnight Mountain and Devil Mountain and south of Goodhope Bay, as well as to the north and east of Spafarief Bay. These schists are, at times graphitic. An unusual phase of the metamorphic rocks appears in Kiwalik Mountain and in the adjacent hills, ...
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Product details

  • Paperback
  • 189 x 246 x 13mm | 440g
  • United States
  • English
  • black & white illustrations
  • 1236815726
  • 9781236815729