XTC Claim (Rico; Blue Jay; Blue Bird Mine), Grayback District (Russell District), Costilla Co., Colorado, USA
PATTON, H.B., AND OTHERS, 1910, GEOLOGY OF THE GRAYBACK MINING DISTRICT, COSTILLA COUNTY, COLORADO: CGS BULL. 2
Commodities (Major) - Copper, Silver
Development Status: Occurrence
Host Rock Unit: Gneiss And Mica Schist, Monzonite Porphyry
Structure: Sierra Blanca Massif, Ft. Garland Embayment, Vega Cr. Anticline, Wagon Mesa Fault
Host Rock: Limestone
Tectonic Structure: Central Cordillera (Southern Rocky Mtns.)
| Chalcocite|| Chalcopyrite|
2 entries listed. 2 valid minerals.
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New Locality Added: Pontével, Cartaxo, Santarém District, PortugalFrom Rui Nunes, 25th Oct 2014 21:07:20