WILLIAM P. BLAKE, Geological Map of a Part of the State of California Explored in 1853 by Lieut. R.S. Williamson, 1853.

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WILLIAM P. BLAKE
Geological Map of a Part of the State of California Explored in 1853 by Lieut. R.S. Williamson
Washington D.C., 1853
Lithograph
Paper size: 24 4/5" 19"

Important early geological map of California, prepared to accompany Blake's report on where to locate the transcontinental railroad.

Color coded by geological regions, with excellent early detail along the Sierras and in Southern California. A marvelous early map of California.

Explored in 1853 by Lieut. R.S. Williamson, U.S. Top. Engr. Prepared to accompany the report of William P. Blake geologist of the expedition. From the Explorations and Surveys for a RR route, from the Mississippi River to the Pacific Ocean. Shows entire state of CA with rivers, few towns, and geologic strata nicely colored from San Francisco Bay south to border.