San Francisco Bay Area (in 5 sheets), 1913
US Geological Survey Maps showing Structure Sections, 1913 edition. Sold as a set of 5 maps in the 15 minute series of the Bay Area, including the Tamalpais, San Francisco, San Mateo, Hayward, and Concord Quadrangles. Folding maps in fine condition made with beautiful chromolithography indicating the geological makeup of the structure sections of the earth in each quadrangle. Each map measures 18 x 22 inches.