Sponsored by the Dept. of Geology/Geography, the School of Adult and Continuing Education, the College of Liberal Arts and Sciences, and Eastern Illinois University.
Field trip leaders: Vincent Gutowski, Eastern Illinois University - Robert B. Jorstad, Eastern Illinois University - Ray Pheifer, Eastern Illinois University - Tom Phillips, University of Illinois - James Stratton, Eastern Illinois University - Gary Wallace, Eastern Illinois University.
Cover title: Guidebook for the 55th annual Tri-State Geological Field Conference.