Emma Mine (Ancient Mine; Black Chief Mine), Butte, Butte District (Summit Valley District), Silver Bow Co., Montana, USA
Ref.: Rocks & Min.: 16:244; 61:12; Geology and Ore Deposits of the Butte District, Montana; W. Weed 1912; Ore Deposits at Butte, Montana, R. H. Sales, 1914
10 entries listed. 10 valid minerals.
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