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Colorful map extending from Memphis across the West to Los Angeles.

The underlying geology surveyed by the notable geologist Jules Marcou is delineated and color-coded with a legend across the bottom naming nine formations. The Atchison, Topeka and Santa Fe Railroad later ran along the western part of this survey. A few cities are located along the way; Helena, Napoleon, Vicksburg, Pine Bluff, Little Rock, Fort Smith, San Antonio, Fort Defiance and Needles.

The route cuts across the Llano Estacado, north of the Wichita Mountains, and along the edge of the Mogollon Rim, here named the Sierra Mogoyon.