Figure 24. Photograph of a coal strip-mine highwall exposure of a thick lens-shaped parting, possibly a floodwater overflow (see fig. 9) in the Upper Freeport coal bed, central Appalachian basin. Photograph by Mark Scanlon (Canyon Fuel Co., LLC, Price, Utah) in Atlas of Coal Geology, American Association of Petroleum Geologists (AAPG) Studies in Geology No. 45 (Papp and others, 1998); AAPG copyright 1998, reprinted by permission of the AAPG, whose permission is required for further use.