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Geology Gold Ores
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Gold placers and their geologic environment in northwestern Park County, Colorado


Singewald, Q. D. (Quentin Dreyer), 1902-1987, author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1950. 1950

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Location Call No. OPAC Message Status
 Axe Federal Documents Online  I 19.3:955-D    ---  Available
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The laramide caborca orogenic gold belt of northwestern Sonora, Mexico : white mica 4°Ar/³9Ar geochr


Izaguirre, Aldo, author.
Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2016. 2016

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Location Call No. OPAC Message Status
 Axe Federal Documents Online  I 19.76:2016-1008    ---  Available
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