Date: October 1911
Creator: United States. Dept. of the Interior.
Description: This structure map shows the topography, altitude above sea level, and a breakdown of the kinds of rocks and minerals found in the Llano, Texas quadrangle region. The map contains a legend that represents with line patterns the surface contour of the region and the kinds of sedimentary rocks and minerals from diverse geological eras.
Contributing Partner: UNT Libraries