Includes bibliographical references. Adhesive "Revision" label affixed at end of bibliography. by Gregory A. Schumacher ; Lisa Van Doren and Michael R. Lester, cartographers. Scale 1:100,000 ; Transverse Mercator projection. "Publication date: 8/93." Includes text, ancillary map of terminal moraines and drainage, 2 cross-sections, stratigraphic column, and diagrams.