Very nice geological survey map from the Pacific Ocean (at San Francisco included) through the San Joaquin Valley to the Sierra Nevadas, CA, as explored by R Williamson and issued by the War Department. This is part of the very large effort to survey the land in conjunction with the construction of the Pacific Rail Road. Colored.
1853 Geological Plan for Pacific RR San Francisco to Sierra Nevada
Geological Section of the Coast Mountains and Sierra Nevada
Map Maker Specifics
W Blake / R Williamson, 1853, Washington
9 x 38 in. plus margins
Very good. Original color, very little age toning in margins. Issued folds.