Memorial to William Hilton Johnson 1935–1997 ALLAN F. SCHNEIDER Department of Geology, University of Wisconsin—Parkside, Kenosha, Wisconsin[removed]ARDITH K. HANSEL Illinois State Geological Survey, Champaign, Illinois

Source URL: rock.geosociety.org

• Phanerozoic
• Geologic time scale
• Historical geology
• Kansan glaciation
• Illinoian
• Last glacial period
• Quaternary
• Last Glacial Maximum
• Yarmouthian
• Pleistocene
• Climate history
• Glaciology