Latitude: 31°41'17"N
Longitude: 110°3'52"W
Ref.: Butler, B.S., Wilson, E.D., and Rasor, C.A. (1938b), Geology and ore deposits of the Tombstone district, Arizona, Arizona Bureau of Mines Bull. 143.
Needham, A.B. & W.R. Storms (1956), Investigation of Tombstone district manganese deposits, Cochise Co., Arizona, US Bureau of Mines Report of Investigation 5188: 30-31.
Farnham, L.L., Stewart, L.A., and Delong, C.W. (1961), Manganese Deposits of Eastern Arizona, US Bureau of Mines Information Circular 7990: 33-34.
Keith, Stanton B. (1973), Arizona Bureau of Mines Bull. 187, Index of Mining Properties in Cochise County, Arizona: 73 (Table 4).
MRDS database Dep. ID file #10027103, MRDS ID #M002072; and, Dep. ID #10112719, MAS ID #0040030012.
A former small surface and underground Mn-Ag-Au mine group/prospect located in South-central sec. 14, T.20S., R.22E, 1½ miles S of Tombstone, on private land. Discovered 1941. Operated by the Tombstone Development Co.
Mineralization is argentiferous manganese oxides in narrow, discontinuous lenses along a fissure zone in Mississippian Escabrosa Limestone.
Local structures include the Ajax Hill Horst, bounded on the west by the Ajax Hill Fault, on the north by the Prompter Fault, and on the south by the Horquilla Peak Fault. The Mn-Ag mineralization phase folowed an Fe-Pb-Zn phase.
Workings are shallow. Some manganiferous silver ore was shipped in the past.
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