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Page 5957, results 148901 - 148925

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Veins in the northern part of the Boulder batholith, Montana
D. M. Pinckney
1965, Open-File Report 65-123
About 20 miles north of Butte and extending nearly to Helena, is an area of 350 square miles containing hundreds of veins and altered zones. The bedrock of the area is 1) late Cretaceous volcanic rocks, forerunners of the Boulder batholith, 2) the Boulder batholith of late Cretaceous to early...
Geology of the Coeur d'Alene district, Shoshone County, Idaho
S. Warren Hobbs, Allan B. Griggs, Robert E. Wallace, Arthur B. Campbell
1965, Professional Paper 478
The Coeur d'Alene district, near the base of the northern panhandle of Idaho, is one of the world's larger lead- zinc and silver-producing areas. The greater part of the dis~rict i~ included within five map areas, from east to west the Pottsville, Mullan, Wallace, Kellogg, and Smelterville, which were geologically...