Cross, Whitman & Hole, Allen D.; Engineer Mountain Folio, Colorado. Geologic Atlas Folio #171. Washington D. C., U.S. Geological Survey, 1910. Large folio (18 x 21 inches), pp.13, (with explanatory text on inside of covers), 1 plate of geological columns, 1 tinted topographic map, 2 colored geological maps.
The folio is in the original tan title wraps with a black cloth spine. Binding it tight a clean with only a small stain at upper and lower inner edge of cover. 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.
The authors discuss the the geography, geology, geological history, stratigraphy and ore deposits of this famous mining region.
The folio will be shipped lightly rolled in shipping wrap in either a USPS or Fed Ex shipping tube.