MapGeological map of the Potomac basin west of Blue Ridge, Virginia and West Virginia : showing the relations of its upper Potomac coal basin and the iron-ore bearing areas in reference to ... Pen-and-ink on tracing linen, mounted on cloth. Corrections to "Explanation of colors" pasted on in lower right. LC Civil War maps (2nd ed.), H220 Available also through the Library of Congress web site as raster image. Includes cross-section at top left: Geological section across Georges Creek coal basin and eastward (scale 1:6000 to 1") by Prof. I.C. White, May 1881, Trans. Am. Phil. Soc. ...
- Contributor: Hotchkiss, Jedediah - Rogers, W.
- Date: 1882