Date of Award
Master of Science
Geological and Environmental Sciences
Dr. William Sauck
Dr. Thomas Straw
Dr. William B. Harrison III
Masters Thesis-Open Access
A combination of geophysical methods were employed in an attempt to characterize a small section of the shoreline of the St. Joseph, Michigan, region of the Lake Michigan shoreline. Electrical resistivity and Ground Penetrating Radar profiles conducted along the shoreline and within the nearshore environment reveal a buried valley of the ancestral St. Joseph river. This valley represents incision of the channel during lowered lake levels at the end of the Pleistocene.
Lakeward dipping radar reflectors are identified throughout the study site. Within the buried valley the reflectors are not glacial till as is the case outside the inferred valley boundaries. Thick sand sequences, channel fill, channel forms and bedding structures as identified by reflection terminations support the presence of a buried valley. Electrical resistivity measurements indicate a valley width of greater than 3.5 km and a depth of approximately 30 meters.
Seng, David L., "Geophysical Investigation at the Mouth of the St. Joseph River Valley and Adjacent Lake Michigan Shoreline in St. Joseph and Benton Harbor, Michigan" (1995). Master's Theses. 4023.