editor-in-chief, Sandra Lach Arlinghaus ; specialist associate editor, Robert F. Austin ; associate editors, William C. Arlinghaus, William D. Drake, John D. Nystuen, with assistance from, Christine Kolars, Kris Oswalt
edited by David R. Soller ; convened by the Association of American States Geologists and the United States Geological Survey ; hosted by the Illinois State Geological Survey