"Asher & Adams' Geological Map. United States and Territories", Asher & Adams
Subject: United States
Period: 1872 (dated)
Publication: New Commercial, Topographical, and Statistical Atlas...
Color: Hand Color
23.5 x 16.1 inches
59.7 x 40.9 cm
This double-page atlas map of the United States depicts seven geological groups via hand-coloring including eozoic, paleozoic, carboniferous, mesozoic, ceonozoic, volcanic rocks, and volcanic centers. It is likely based upon the 1873 map by Charles Hitchcock and William Blake. In addition to geology, the map shows railroads, rivers and numerous place names.
Light toning, minor offsetting, and a few spots of foxing.