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Tunnel Spring Mine (Tunnel Springs prospect; Tunnel Springs group of claims; Ramshorn prospect), Yuma County, Arizona, USA

Tunnel Spring Mine (Tunnel Springs prospect; Tunnel Springs group of claims; Ramshorn prospect), Yuma County, Arizona, USA : A surface and underground Au prospect located on 2 unpatented claims in North-central sec. 31, and the center S½ sec. 30, T1N, R17W (protracted), about ¾ of a mile west of Tunnel Springs, on . ....

United States , Index Of Mining Properties In Yuma Co , Arizona Bureau Of Geology , Arizona Bureau Of Mines , Mineral Technology , Detailed Mineral List , Arizona Bureau , Mining Properties ,

Omega Extension Mine, Monument Mountain, Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USA

Omega Extension Mine, Monument Mountain, Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USA : Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 92, 115-117.

Creasey, S.C. & G.L. Quick (1955), Copper deposits of . ....

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