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Structure Sections: Texas Llano Quadrangle

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.
Date: October 1911
Creator: United States. Dept. of the Interior.