CGRG Bibliography of Canadian Geomorphology
Search Results
Author : Dworkin, S.I.; Larson, G.J.; and Monaghan, G.W.
Date : 1985
Title : Late Wisconsinan ice-flow reconstruction for the Central Great Lakes region
Publication : Canadian Journal of Earth Sciences
Issue : 22(6):
Page(s) : 935-940.
Abstract
Late Wisconsinan tills from the lower peninsula of Michigan can be differentiated with respect to the Lake Michigan, Saginaw,and Huron-Erie lobes on the basis of their heavy-mineral assemblages. Using discriminant analysis, the heavy-mineral assemblages can also be associated with specific source areas on the Canadian Shield. These associations suggest that (1) the Lake Michigan Lobe flowed southwestward across a region north of Lake Huron and then into southwestern Michigan; (2) the Saginaw Lobe flowed southwestward across a region north of Georgian Bay and then southward into southeastern Michigan. Comparison of the heavy-mineral assemblages of tills from southeastern Michigan with those from younger tills just south of Lake Huron indicates that a significant westward shift in source area occurred during the retreat of the Huron-Eric Lobe from southeastern Michigan.
Bibliography of Canadian Geomorphology