This is the second edition of Hitchcock important geological map of the United States. In addition to the geologic formations, the 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. The map is accompanied the disbound Fifth Annual Report of Rossiter W. Raymond, United States Commissioner of Mining Statistics. J. Bien lithographer.

References: Marcou & Marcou #67.

Condition: B+

The map is fine with bright, strong color and impression. The clean fold separations are closed with archival tape. The report is disbound and the first few pages are loose.