Richardson, G. B.; Castle Rock Folio, Colorado. Geologic Atlas Folio #198. Washington D. C., U.S. Geological Survey, 1915. Large folio (18 x 21 inches), pp.13, (with explanatory text on inside of covers), 1 topographic map, 1 sheet of columnar sections, 1 colored geological map, 1 colored structural sections map, 2 plates of photographs.
The folio is complete and in the original tan title wraps with a black cloth spine. Binding it tight a clean. The text and maps are clean and bright. 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.
Richardson discuss the topography, geography, geology, stratigraphy and economic resources of the region.
The folio will be shipped lightly rolled in shipping wrap in either a USPS or Fed Ex shipping tube.