NO RESERVE

"Sketch Map Showing the Distribution of the Strata and Eruptive Rocks in the Western Part of the Plateau Province", U.S. Geological Survey (USGS)

This map details the region from Prescott (Ft. Whipple) and Camp Verde north through the Grand Canyon and Marble Canyon, today's Canyonlands National Park, Moab, and the southern portion of the Great Salt Lake. It locates the Wasatch and Uintah Mountains, the Bad Land Cliffs (Book Cliffs), the San Juan River, etc. and has remarkable detail of the river systems and topography. This thematic map identifies ten geological types through color including: Tertiary, Cretaceous, Jurassic, Trias, Permian, Carboniferous, Silurian, Archaean, Trachyte, Rhyolite & Andesite, and Basalt. Engraved by J.H. Renshawe. A colorful and handsome map.

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Condition: B+

Issued folding and now flattened and backed with tissue. There is some faint color offsetting and a couple of small edge tears confined to the bottom blank margin.