By: J. J. Anderson, J.M. Sigmund, C.G. Cunningham, T.A. Steven, J.C. Lanigan, and P.D. Rowley
Geologic maps use a combination of colors, lines, and symbols to depict the relative age, composition, and relationships among rocks and sediments at and near the earth's surface.
Plates: 1 pl.
Location: Beaver County