Title from caption. At head of title: "Plate I." Compiled by R.S. Blatchley. 10 sections on one sheet. Geologic columns showing stratigraphic layering of coal, shales, sandstones, and oil and gas sands. Includes geologic time table and correlation lines. Detached from: The Oakland City, Indiana, oil field in 1910 / Ralph F. Blatchley. In Indiana Department of Geology and Natural Resources thirty-fifth annual report ... 1910. Indianapolis : Wm. B. Burford, 1911. Page 88.
Imprint: [Indianapolis] : [Indiana Department of Geology and Natural Resources], [1911]; Imprint: [Indianapolis] : [Wm. B. Burford], [1911]
Dimensions: on sheet 37 x 26 cm