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Pre-Cambrian Rocks of the Lake Superior Region: A Review of Newly Discovered Geologic Features, with a Revised Geologic Map

Description: From abstract: Detailed knowledge of the geology of the pre-Cambrian rocks of the Lake Superior region has been greatly augmented since the publication of Monograph 52 by the United States Geological Survey in 1911. The authors have attempted in the present report to assemble as much of this new information as possible, and to give the reader a birdseye view of the geology as seen in the light of all studies made there up to the present time. Detailed descriptions are not presented, and the emp… more
Date: 1935
Creator: Leith, C. K.; Lund, Richard Jacob & Leith, Andrew
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Geology of Big Horn County and the Crow Indian Reservation, Montana: with Special Reference to the Water, Coal, Oil and Gas Resources

Description: From introduction: This report contains information concerning the geology of Big Horn County and the Crow Indian Reservation and their resources in ground water, coal, oil, and gas. These facts were collected in the course of studies for about a dozen field projects, which ranged in character from reconnaissance studies of large areas to very detailed mapping of certain tracts to show the occurrence of oil and gas. Consequently, the information at hand, either as to the geology or the resource… more
Date: 1935
Creator: Thom, W. T., Jr.; Hall, George Martin; Wegemann, Carroll H. & Moulton, G. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Geology of the Tonsina District, Alaska

Description: From introduction: The purpose of this paper is to describe the geology and mineral resources of a part of the Copper River Basin between the Richardson Highway and the valley of the Klutina River, together with small areas east of the highway and west of the river. For convenience in reference this area is called the Tonsina district, as the Tonsina River and Tonsina Lake are conspicuous local geographic features, and the Tonsina Road House, on the highway at the crossing of the river, is one … more
Date: 1935
Creator: Moffit, Fred H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Willow Creek-Kashwitna District, Alaska

Description: From introduction: The district described in this report is a triangular area covering about 300 square miles in the southwestern part of the Talkeetna Mountains. The Kashwitna River forms the northern boundary, the Susitna Valley flats the western, and the Willow Creek gold district, which is in the extreme southwestern part of the Talkeetna Mountains, the southern. As the area examined is not a distinct geographic unit, its boundaries being arbitrarily chosen and set only by the limitation of… more
Date: 1935
Creator: Capps, Stephen R. & Tuck, Ralph
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Geology of the Santa Rita Mining Area, New Mexico

Description: From abstract: The Santa Rita mining area (pl. 1), covering 35 square miles of semiarid mountainous land, lies within the Silver City 30-minute quadrangle, Grant County, N. Mex., and includes the most productive part of the Central or Hanover mining district. Ore was produced in this district as early as 1804 and production continued intermittently for a century before the developments were undertaken that led to large-scale copper mining, which began in 1912. The output of zinc, lead, and iron… more
Date: 1935
Creator: Spencer, Arthur C. & Paige, Sidney
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Contact Mining District, Nevada

Description: From abstract: This report summarizes the results of a reexamination, in 1930, of the Contact mining district, in Elko County, northern Nevada. A report published as a result of a visit in 1910 summarizes the major features of the geology of the district, and the principal new data in the present paper pertain to mining development occasioned by the completion of a railroad through the camp in 1925.
Date: 1935
Creator: Schrader, Frank C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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