Geological cross section showing stratigraphy of mineral resources, including various limestone and shale layers. Relative relief in relation to sea level shown by profile. See "Map showing lines of geological sections and the relation of Trenton rock to sea level" for location of profile line. Detached form: Indiana's structural features as revealed by the drill / E. P. Cubberley. In Indiana Department of Geology and Natural Resources eighteenth annual report ... 1893. Indianapolis: Wm. B. Burford, 1894. Page 246. Imprint: Indpls : lithographed by William B. Burford, [1894]; Imprint: [Indianapolis] : [Indiana, Dept. of Geology and Natural Resources], [1894] Dimensions: 15 x 23 cm
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