Title-sheet, index sheet, 1 duotone lithographed general map, 5 double-sheet duotone lithographed topographical maps, 5 double-sheet color lithographed geolocial maps, and 1 double-page color lithographed sheet of general geological sections, all linen-backed, loose in portfolio, as issued. The single sheets are 33x24, the double sheets are 33x48. The portfolio is half-leather, and there are remnants of the plain paper folder within which the maps were protected.

Rare and highly sought-after mammoth atlas, one of several which accompanied King's seminal seven-volume report on the geology of the western states. Included is a general map of the American West, and maps of five regions, both geological in color, and topographical in duotone. The regional maps include: Rocky Mountains; Green River Basin; Utah Basin; Nevada Plateau; and Nevada Basin.