Water Resources of Michigan
Continuous Seismic-Reflection Profiling near Grassy Island, Wyandotte Unit of Shiawassee National Wildlife Refuge, Wyandotte, Michigan
US Geological Survey Administrative Completion Report for WRD Reimbursable Agreement No. 8-4426-06000 of USFWS Parent Project No. 14-48-0003-97-905, DCN#1448-30181-97-N344, Unofficial publication #ACR97-01
Lansing, Michigan 1997
By: Michael J. Sweat
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Abstract
From November 18 through 20, 1996, continuous seismic-reflection profiles were collected along the shoals of Grassy Island, which lies in the Detroit River, east of Wyandotte, Michigan. Profiles were collected using both 3.5 kilohertz and 14 kilohertz energy sources in an effort to optimize the penetration depths and the resolution of the profiles. Profiles were collected in both upstream and downstream directions, as well as east-west and west-east directions. Results of the profiles allowed the determination of general lithologic properties of the riverine sediments and the depth to the underlying bedrock; sediments are generally glacio-lacustrine clays, and range in thickness from about 1 to 6 meters (3.3 to 19.7 feet), although they are locally absent.
Citation:
Sweat, Michael J., 1997, Continuous Seismic-Reflection Profiling near Grassy Island, Wyandotte Unit of Shiawassee National Wildlife Refuge, Wyandotte, Michigan, U.S. Geological Survey Administrative Completion Report for WRD Reimbursable Agreement No. 8-4426-06000 of USFWS Parent Project No. 14-48-0003-97-905, DCN#1448-30181-97-N344, Unofficial publication #ACR97-01
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