Bownocker, J. A. 1865-1928Scale [1:506,880]. Eight miles to one in.Geologic formations shown by colors and symbols."Based on preceding maps by Newberry and Orton.""A. Hoen & Co., Baltimore, M.D."J.A. Bownocker, State Geologist.TIFFhttps://hdl.handle.net/1811/bd73c4fc-cd7e-4f9c-a50f-1192dcd6fce1engGeological Survey of OhioPublicGeologyA geological map of OhioMapsOhioThe Ohio State University