This is Herbert Gregory's 161-page geological report on the region in rare hardback that contains the folding Map of the Navajo Country Arizona, New Mexico, and Utah (29.5 x 23"). The map depicts the Navajo Indian Reservation in northeastern Arizona, northwestern New Mexico, and southeastern Utah. It displays roads. streams, trails, bridges, mines, public buildings. etc. as well as the routes of the scientific explorations before 1909. The report also contains a Geologic Map of the Navajo Country... which has the same base map and is attractively augmented by 16 different geological types. In addition to the maps, there is a plate of geologic sections and numerous full-page photographic plates. Hardbound in maroon cloth with gilt title on the spine.

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Condition: A

Maps, plates and text are remarkably clean and bright. The geological sections plate has a small edge tear at top that has been closed on verso with archival tape. Covers are lightly worn.