Relief shown by spot heights.
Structure contour interval 10 feet. Key bed: top of "Brown Lime" (Mississippian).
"Oil and gas development correct to September 15, 1927."
Includes "Subsurface structural sections in Ambrose Oil Pool, Ohio Co., Ky., by W.C. Eyl, correct to Aug. 27, 1927."
Covers the region around Bells Run and Adaburg in Ohio County, Kentucky.