Date of Award
Master of Science
Geological and Environmental Sciences
Dr. Alan E. Kehew
Dr. David Barnes
Dr. William Sauck
Masters Thesis-Open Access
The surficial glacial deposits and landforms of Van Buren County were recently mapped at a 1:24,000 scale as part of a STATEMAP project. Several borings were drilled to supplement the surface data. Six of these borings were characterized in detail by means of gamma ray logging, textural analysis, and X-ray diffraction of the clay-sized fraction of the diamicton units.
Results from this study reveal two diamicton units at stratigraphically distinct positions that can be correlated across the county and that are separated by a thick sequence of lacustrine sediments. Correlation of diamicton and lacustrine units was accomplished by analyzing several factors, including topography, stratigraphic position, texture, and clay mineralogy. The diamicton units in this study correlate to an upper and lower diamicton at the bluffs of Lake Michigan as well as to inland surface diamictons that Monaghan et al. (1986) characterize and informally name the Saugatuck and Ganges tills. This stratigraphy also correlates with other regional studies (Wong, 2002; Bird, in preparation) and suggests an advance of the Lake Michigan Lobe at least as far as the Kalamazoo Moraine, a subsequent retreat of the lobe with a significant period of a lacustrine deposition, followed by a readvance.
Beukema, "Stratigraphy of Lake Michigan Lobe Deposits in Van Buren County, Michigan" (2003). Master's Theses. 4445.