Date of Award

4-2005

Degree Name

Master of Science

Department

Geosciences

First Advisor

Dr. Alan Kehew

Second Advisor

Dr. David Barnes

Third Advisor

Dr. William Sauck

Access Setting

Masters Thesis-Open Access

Abstract

The modern day landscape of Van Buren County Michigan was created by the advance and retreat of glaciers from about 13,000 to 20,000 years ago. The Lake Michigan Lobe of the Laurentide Ice Sheet sculpted southwest Michigan most recently. The sediments deposited by the glacier include diamicton, outwash sediments, and lacustrine deposits. The build up of sediment by the glaciers led to the construction of particular features such as moraines, till plains, and outwash fans. The huge amount of meltwater from the glaciers led to the erosion of channels throughout the area. In the area of this investigation the Ganges till is the diamicton deposited as the Lake Michigan Lobe advanced to the east. Above this diamicton is a thick sequence of glaciolacustrine deposits from an extensive proglacial lake system. Capping this lacustrine sediment is the Saugatuck Till, a discontinuous diamicton, deposited as the Lake Michigan Lobe readvanced over the area. Geologic cross-sections were constructed for the area using surficial sediment data, water-well data, as well as rotasonic boring data. These data were augmented with a geophysical survey near one of the rotasonic borings.

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