58 x 46 cm., on sheet 87 x 102 cm., folded in envelope 30 x 24 cm. Relief shown by contours and spot heights. "Contour interval 40 feet." "Base from U.S. Geological Survey 1:62,500. 1954." "Geology mapped in 1985 and 1988." Includes text, bibliography, 4 col. cross sections, and location and index maps. "Prepared in cooperation with the U. S. Atomic Commission." Original publisher: U. S. Geological Survey, Series: Miscellaneous investigations series, map I, Scale: 1:24 000.
At head of title: 'North America, sheet XV.' 'Published under the superintendence of the Society for Diffusion of Useful Knowledge.' At bottom center of map:'London, Charles Knight, Jany. 1st, 1852.' At bottom right of map: ' J. & C. Walker Sculpt.' Scale [1:7,500,000] 1 degree to 68.89 English miles (W 125°--W 92°/N 43°30?--N 22°30?). Relief shown by hachures. Atlas page number in lower margin: 144. Boundaries hand colored. Includes notes, locations of Indian tribes, population statistics. Charles Knight.