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Owyhee Mountains
The Owyhee Mountains are a mountain range in Owyhee County, Idaho and Malheur County, Oregon.〔
Mahogany Mountain and the associated volcanic craters of the Lake Owyhee volcanic field are in the Owyhee Mountains of Oregon just east of the Owyhee Reservoir on the Owyhee River.〔Cummings, Michael L., et al., ''Stratigraphic and structural evolution of the middle Miocene synvolcanic
Oregon-Idaho graben,'' Geological Society of America Bulletin, 2000; v. 112, no. 5; pp. 668-682〕
The southeastern end of the range including the old mining area west of Silver City is referred to as the Silver City Range.〔''Murphy, Idaho,'' 30x60 Minute Topographic Quadrangle, USGS, 1986〕 About west of Silver City is the De Lamar ghost town in Jordan Creek below the mine workings on De Lamar Mountain to the south.〔 The area was active in the late 1880s. In the 1970s mining began again with the development of open pit silver–gold mines on De Lamar Mountain.〔Bonnichsen, Bill; ''Epithermal Gold and Silver Deposits Silver City–De Lamar District, Idaho,'' University of Idaho, Idaho Geological Survey, Technical Report 83-4, 1983 (PDF )〕〔''De Lamar, Idaho,'' 7.5 Minute Topographic Quadrangle, USGS, 1990〕
== References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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