Stratigraphic Sections of the Phosphoria Formation 1953, Circular 375

by R. W. Swanson, R. P., Sheldon, Carswell L.

$20 · Offered by Crossroads Books

Washington D.C. U.S. Geological Survey, 1956. stapled binding, 11" Tall, cover clean, pages clean, binding very good, 30 pages. Since 1947, the U.S. Geological Survey has measured and sampled phosphatic parts of the Phosphoria formation of Permian age and its partial stratigraphic correlatives at many localities in Montana, Idaho, Wyoming..... More

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