D. Mark Jones is Ohio’s 15th State Geologist and serves as Chief of the Division of Geological Survey, overseeing ODNR’s efforts to provide geologic information and services to the public.

Starting as an intern with the Survey in 1996, Jones spent several years in the private sector before returning in 2008 to serve as the Lake Erie geologist and then supervisor of the H.R. Collins Core Laboratory at Alum Creek State Park.

Jones is the author or co-author of 12 Survey publications, including The Geological Guidebook to State Parks in the Lake Erie Region. He holds a bachelor’s degree in geology from Cleveland State University and a master’s in geology from Kent State University.