Geology topics
Ed DeWitt
Publications and source records attributed to Ed DeWitt.
Map of mines, prospects, and patented mining claims, and classification of mineral deposits in the Nahant 7 1/2 minute Quadrangle, Black Hills, South Dakota
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Map of mines, prospects, and patented mining claims, and classification of mineral deposits in the Pactola Dam 7 1/2 minute Quadrangle, Black Hills, South Dakota
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Map of mines, prospects, and patented mining claims, and classification of mineral deposits in the Medicine Mountain 7 1/2 minute Quadrangle, Black Hills, South Dakota
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Mineral resource potential and geology of the Black Hills National Forest, South Dakota and Wyoming with a section on salable commodities
No abstract available.
Geology and gold deposits of the Oatman District, northwestern Arizona
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Mineral resource potential map of the Fossil Ridge Wilderness Study Area, Gunnison County, Colorado
Parts of the Fossil Ridge Wilderness Study Area have a high resource potential for gold and silver in small deposits, uranium in medium-size deposits, and high-calcium limestone in large deposits. Parts have a moderate to high potential for uranium, thorium, and light rare-earth elements in small- to medium-size deposits, a moderate potential for copper, lead, and zinc in small deposits, a low potential for molybdenum in small deposits, and an unknown potential for molybdenum in deposits of unknown size. Parts of the area have a low potential for cobalt, chromium, tungsten, beryllium, boron, and tin in small deposits. And, depending on the extraction of precious metals, parts of the area could have a low potential for arsenic in small deposits. Tungsten, rare-earth elements, and tin could not be considered resources except for coexisting base metals, thorium, and uranium. Areas that immediately adjoin the Fossil Ridge Wilderness Study Area have a high potential for molybdenum in large deposits, lead in medium-size deposits, and zinc -in small- to medium-size deposits. Depending on the extraction of base metals, parts of the adjoining areas could have a low resource potential for bismuth and cadmium as byproducts in medium-size deposits.
Map, description and bibliography of the mineralized areas of the Basin and Range Province in Arizona
No abstract available.