"Geological Map of a Part of the State of California", Williamson, R. S. (Lt.)
Period: 1855 (circa)
Publication: Pacific Railroad Surveys
Color: Hand Color
16.1 x 22.2 inches
40.9 x 56.4 cm
The entire state is shown but only a portion is hand colored to reflect geological knowledge. These regions are color coded in accordance to a legend at the left side of the map. It is a nice early and colorful map of California with a fair amount of geographical detail provided.
References: Marcou & Marcou #678.
Crisply engraved lines. Folding and close trimmed at binders edge, as issued. A couple small spots and light toning along lower folds.