Geology-Mining, Monarch & Grayback Districts, Colorado

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Crawford, R. D. & Patton, Horace B., et.al.; A Preliminary Report on the Geology of the Monarch Mining District Chaffee County, Colorado. Colorado Geological Survey Bulletin 1, 1910. Quarto, pp.78, 11 folded maps and plates, 3 figures. & Geology of the Grayback Mining District, Costilla County Colorado. Colorado Geological Survey Bulletin 2, 1910. Quarto, pp. 111, 9 folded maps and plates. The works are bound as a set as issued, are complete and in the original brown cloth with gilt titles. The binding is tight and very clean with bright spine titles. The text, plates and maps are very clean, a small museum stamp on end sheet, title pages and very margin of some plates and maps. In very good condition. Nice complete copies of the work are scarce.These two works were published as a set by the Colorado Survey. In Bulletin 1 Crawford provides the first detailed study of the geology, structure, stratigraphy and economic geology of the Monarch Mining District which includes Monarch Hill, Taylor Gulch, Cree Camp and the Columbus Gulch area. They describe the types and character of the ores (gold, lead-zinc, silver, manganese) and their mineralogy and then provide a description of the individual mines and their workings. In bulletin 2, Patton, Smith, Butler and Hoskin provide a similar description of the Grayback Mining District which lies read more

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