Preliminary geologic map of the Twin Buttes quadrangle, Pima County, Arizona
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Open-File Report↗
Geology topics
John R. Cooper
Publications and source records attributed to John R. Cooper.
Western Molybdenum Company mine, Chewelah District, Stevens County, Washington
The Western Molybdenum Co. mine was opened many years ago to obtain copper. The only production was several carloads of crude copper ore shipped during World War I. An unsuccessful attempt to produce molybdenum was made in 1939-1941.
Washington↗