Date of Award
Master of Science
Geological and Environmental Sciences
Dr. W. Thomas Straw
Dr. Lloyd Schmaltz
Dr. W. David Kuenzi
Dr. Caspar Cronk
Masters Thesis-Open Access
A detailed investigation of selected textural and mineralogical aspects of tills in southwestern Michigan is used to define an interlobe boundary relationship between the Wisconsinan ice of the Lake Michigan and Saginaw lobes. Bedrock underlying the study area contributed little to the bulk composition of the tils investigated. However, morainal development in the study area shows strong correlation with bedrock topography.
In a discussion of the deglaciation of Michigan and the study area, a history of morainal development is reviewed and attention is focused on the reentrant district located in Kalamazoo and neighboring counties. Attempts to delineate tills of the Lake Michigan and Saginaw lobes using textural and magnetic susceptibility data were inconclusive. However, the character and extent of an interlobate boundary relationship in the study area is delimited by ratios of heavy minerals, as well as, ratios of the 7A/10A peaks produced by clays in X-ray diffractograms.
Lovan, Norman A., "Analysis of an Interlobate Boundary in the Wisconsinan Drift of Kalamazoo County and Adjacent Areas in Southwestern Michigan" (1977). Masters Theses. 2207.