B. Glacial

C. Landforms

D. Soils

E. Hydrology

F. Flora

G. Fauna

H. Climate

Precambrian glaciations
Quaternary glaciations
       preglacial topography
       the last glacial advance: the Wisconsin
              onset of the ice
              major ice lobes
              retreat of the ice: 18,000 - 10,000 BP
              FEATURE: Detailed deglaciation sequence (images only)
                     Part I: beginning of deglaciation
                     Part II: middle phase of deglaciation
                     Part III: about 12,000 BP to the present
       glacial lakes associated with the retreating ice sheet
              Chicago, Saginaw and Maumee
              Algonquin
              Chippewa and Stanley
              Nipissing
       Holocene (last 10,000 years) changes in the Great Lakes
              crustal adjustments and isostatic rebound
              impacts on harbors