Plummer, F. B. (Frederick Byron), 1886-1947Includes generalized columnar sections and generalized sectoin bend formation.; "Plate 1"--upper right.132 x 75 centimetersJPEGUMN_ALMA:9957033850001701engUniversity of Texas, Bureau of Economic Geology and Technology (Austin, Tex)PublicGeologic map of the Pennsylvanian area in north-central TexasMapsTexas1921University of Minnesota