"Geological Map of the United States compiled by C.H. Hitchcock and W. P. Blake…", Hitchcock, Charles Henry
Subject: United States
Period: 1873 (dated)
Color: Printed Color
33.5 x 21.5 inches
85.1 x 54.6 cm
Large and colorful map includes information identifying railroads, roads, canals, army arsenals and forts. A table at lower left provides an explanatory key to the colors used to indicate nine distinct geological formations. The carefully drawn map shows good geographical detail as well as remarkable geological information. J. Bien lithographer.
Issued folding, now pressed and backed with archival tissue. Printed on thick paper. Faint toning along some folds. Two folds with some separations supported on verso.