Technical Report Archive & Image Library (TRAIL) - 4 Matching Results

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Microscopic Structure and Concentratability of the Important Iron Ores of the United States

Description: Outline of Problem: "This paper covers a survey of 19 ores collected from seven of the more important iron-ore districts of the United States and is a contribution by the ore-dressing section of the United States Bureau of Mines to general research program on iron and steel being conducted by the Bureau."
Date: 1936
Creator: Cooke, S. R. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Safety Cars of the United States Bureau of Mines

Description: Report issued by the U.S. Bureau of Mines discussing the mine stations and safety cars used to reach miners in distress. As stated in the report, "the purpose, equipment, personnel, and construction of its safety cars" is presented. This report includes an illustration, and a map.
Date: March 1931
Creator: Forbes, J. J. & Ankeny, M. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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
open access

Quaternary Geology of Minnesota and Parts of Adjacent States

Description: Description of geology in Minnesota and explanations of glacial drift within the state an immediate surroundings (Wisconsin, Iowa, North Dakota and South Dakota) with sections detailing the movement of each glacier and relevant geological notes. Index starts on page 147.
Date: 1930
Creator: Leverett, Frank, 1859-1943
Item Type: Refine your search to only Report
Location: None
Partner: UNT Libraries Government Documents Department
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