Very nice geological survey map of mid to southern California 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.
1855-6 Geological Plan for Pacific Rail Road Surveys
Geological Plan of the Coastal Range of California from San Francisco to Los Angeles - No. 1
Map Maker Specifics
J Parke / T Antisell, 1856-7, Washington
16.8 x 11.3 in. plus margins
Very good. Nice color, very little age toning in margins. Issued folds plus one. Two small marginal chips.