Outer portion of the vein containing considerable tellurium, and high values in copper, gold, and silver; specimen is from Commercial mine. Salt Lake county, Utah, 1900.

Sulphide enrichment. A central band of cupriferous pyrite (P) containg a trace of tellurium and low values in copper, gold, and silver, is inclosed by bands of chalcocite (C) and tenorite, forming the outer portion of the vein containing considerable tellurium, and high values in copper, gold, and silver. Specimen is from Commercial mine. Natural size. Speciment 220. Salt Lake county, Utah, 1900, in false color as plate 38c in U.S. Geological Survey. Professional paper 38. 1905.

Categories: Image; Tags: Boutwell, J.M. Collection, Commercial Mine, Mills, Mines, Quarries, Photographers, Salt Lake County, Utah, All tags... photo print, Fewer tags

Commercial Mine. Salt Lake County, Utah. 1902.

Commercial Mine. Salt Lake County, Utah. 1902.

Categories: Image; Tags: Boutwell J.M. Collection, Commercial Mine, Mills, Mines, Quarries, Photographers, Salt Lake County, Utah, All tags... photo print, Fewer tags

Tipple at Commercial (no. 8) mine of Roundup Coal Mining Co. Musselshell County, Montana. 1909.

Tipple at Commercial (no. 8) mine of Roundup Coal Mining Co., about a mile west of Roundup, in Sec. 23, T. 8 N., R. 25 E. Musselshell County, Montana. 1909. Plate 11-B in U.S. Geological Survey. Bulletin 647. 1917.

Categories: Image; Tags: Commercial Mine, Lupton, C.T. Collection, Mills, Mines, Quarries, Musselshell County, Montana, Photographers, All tags... photo print, Fewer tags