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Idri salt deposits, Fezzan Province, Libya
Gus H. Goudarzi
1962, Open-File Report 62-53
The Idri salt deposit, located 135 kilometers west of Brack in the Shatti Valley area of the Fezzan province, United Kingdom of Libya, covers an area of about 35 square Kilometers. It is connected to the newly constructed black-top Fezzan road by about 250 kilometers of secondary road. The deposit...
Geology of the Straight Creek tunnel site, Clear Creek and Summit Counties, Colorado, and its predicted effect on tunnel construction
Charles Sherwood Robinson, Fitzhugh T. Lee
1962, Open-File Report 62-111
The purpose of this report is to present the preliminary results of the geologic and geophysical research conducted by the U. S. Geological Survey at the surface over the proposed Straight Creek tunnel. The results are interpreted and predictions are made, based primarily on statistical analyses, as to the probable...
A new occurrence of beryllium minerals on the Seward Peninsula, Alaska
C.L. Sainsbury
1962, Open-File Report 62-114
Beryllium in the form of chrysoberyl was found at a new locality on the public domain on the Seward Peninsula. The beryllium is associated with altered dikes and marmorized limestone veined with fluorite-tourmaline-chrysoberyl veinlets. Although the chrysoberyl is fine grained and intergrown intricately with the fluorite and tourmaline, it has...
Bentonite deposits of the northern Black Hills district, Wyoming, Montana, and South Dakota
Maxwell M. Knechtel, Sam H. Patterson
1962, Bulletin 1082-M
The northern Black Hills bentonite mining district includes parts of Crook County, Wyo., Carter County, Mont., and Butte County, S. Dak. Within this district, many beds of bentonite occur interspersed with sedimentary strata of Cretaceous age that have an average total thickness of about 3,000 feet and consist chiefly of...