Cross, Whitman & Ransome, F. L.; Rico Folio, Colorado. Geologic Atlas Folio #130. Washington D. C., U.S. Geological Survey, 1905. Large folio (18 x 21 inches), pp. 20 (with explanatory text on inside of covers), 2 tinted geography maps, 1 columnar sections, 1 plate of photographs, 4 colored plates of geology, structural sections economic geology.
The atlas is complete and in the original tan title wraps with black cloth spine. The binding is tight, light toning to the outer margins of cover, Kittery Maine, library stamp on upper outer edge of cover, minor short tear at outer margin of rear cover repaired with clear archival tape. Text and all maps exceptionally clean. In very good condition.
Between 1894 and 1945 the USGS issued 227 folios covering various areas of the United States. The text pages of a folio covered the geology, historical geology, stratigraphy and if present the mineral and mining industry.
The authors discuss the topography, geologic history, geology, stratigraphy, structural geology of the Silverton region. They then discuss the ore bodies, mineral deposits and origins of the mineral deposits in this famous mining district.
The folio will be shipped lightly rolled in shipping wrap in either a USPS or Fed Ex shipping tube.