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 northwest of Georgian Bay and then into south-central Michigan; and (3) the Huron–Erie 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–Erie Lobe from southeastern Michigan.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.