WALCOTT, Charles D. Geologic Atlas of the United States. Jackson, Folio California … Folio 11. Library Edition [cover title]. Washington D. C., Engraved and printed by the U.S. Geological Survey, 1894.
Large folio (55.5 x 47 cm); original printed wrappers with cloth back-strip; pp. , explanatory text inside wrappers, 4 colour-printed maps (geological and topographic); wrappers a little spotted, internally very good; provenance: Royal Institution, stamp on front cover.
This ambitious publication came out between 1894 and 1945 in 227 issues, called Folios. This issue is devoted to a small part of the Californian Gold Belt, which is the headline of the fist portion of the text.