Geology and Mineral Resources of the Judith Mountains of Montana

Geology and Mineral Resources of the Judith Mountains of Montana

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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. 1898 edition. Excerpt: ...the Carboniferous beds that the largest mines in the district have been located--the Spotted Horse at one end of the contact and the Maginnis group at the other Trasso." MAIDEN CREEK CANYON. 529 end. It is believed that the area of contact between these two will become a favorable ground for exploration work in the future. Further details in regard to these mines will be found in the last chapter of this paper (p. 602). The porphyry has had a decided contact action on the limestones, bleaching them in places; but the action from hot solutions, vapors, etc., shown by the formation of purple and pink fluorite, quartz, etc., with deposition of the ores, is more marked, while a third set of changes, due to the decay from air and surface waters, has often masked many of the former. In the Spotted Horse Gulch the Cambrian slates have been prospected, but apparently without success, as no development work has been done. In regard to the character of the porphyry composing this large mass, details have already been given, and the rock is described in the chapter on the igneous rocks (p. 560). CANYON OF MAIDEN CREEK. The canyon of Maiden Creek, which, commencing at the divide above the town of Maiden, leads down into the open country on the southeast side of the mountains, is about 2 miles along, and presents in this distance the most picturesque scenery to be found in the mountains. From the divide down to the point where the Spotted Horse Gulch opens into it the canyon is cut in Carboniferous limestones, descending the slopes from Sheep Mountain above. The bottom of the canyon is dry, whatever drainage there is passing underground, and its floor is occupied by the mail road. The grade is excellent and without break. The character of the...
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Product details

  • Paperback | 82 pages
  • 189 x 246 x 4mm | 163g
  • United States
  • English
  • black & white illustrations
  • 1236769147
  • 9781236769145