Bedrock Geologic Map of Ohio, Map BG-1, by E. R. Slucher, principal compiler, E. M. Swinford, G. E. Larsen, G. A. Schumacher, D. L. Shrake, C. L. Rice, M. R. Caudill, R. G. Rea; cartographic compilation by D. M. Powers, 2006. 50- x 41-inch format, scale 1:500,000 (1 inch equals about 8 miles), full color. Map BG-1, along with associated text and figures, reveals not only the characteristics and distribution of the state's various bedrock formations but also details the many economic mineral commodities, environmental characteristics, and geologic hazards occurring in Ohio. Nearly 50 bedrock units or combinations of units are shown statewide and the legend describes the geologic formations and identifies their geologic age. A statewide geologic cross section provides a three-dimensional perspective of the geologic framework of Ohio.