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Page 6203, results 155051 - 155075

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Occurrence of diatomaceous earth near Kenai, Alaska
George Plafker
1955, Open-File Report 55-139
Diatomaceous earth occurs in post-glacial lake deposits exposed along the shore of Cook Inlet north of the village of Kenai, Alaska. Diatomaceous earth is an unconsolidated earthy deposit formed by accumulation of the minute siliceous tests (skeletons) of diatoms, a type of algae. Diatomaceous earth is sometimes referred to...
Geology of the Fourmile pegmatite area, Custer County, South Dakota
Jack Allison Redden
1955, Open-File Report 55-145
The Fournile pegmatite area covers 32 sq. mi. in the western part of the Custer pegmatite mining district, Custer County, South Dakota. This area has been one of the major sources of sheet mica in the United States, especially between 1906 and 1911, and it has been a significant source...
Geology of the southeastern part of the Robinson Mountains, Yakataga district, Alaska
Don John Miller
1955, Open-File Report 55-114
This report gives the results of geologic investigations in the Yakataga district on the south coast of Alaska, including detailed geologic mapping in the southeastern part of the Robinson Mountains, and reconnaissance study of the stratigraphy and structure of adjoining areas. The geologic map that accompanies this report covers an...
Phosphate deposits in northern Alaska
William Wallace Patton Jr.
1955, Open-File Report 55-132
Deposits of low and medium grade phosphate rock were found recently at seven localities on the Arctic slope of Alaska. They were reported by field parties of the U.S. Geological Survey during the mapping of Naval Petroleum Reserve No. 4 and adjacent areas. The deposits are sedimentary in origin and...