Mapping suspected buried channels using gravity: Examples from southwest Michigan
Conference
·
· Geological Society of America, Abstracts with Programs; (United States)
OSTI ID:6949969
- Western Michigan Univ., Kalamazoo, MI (United States). Dept. of Geology
This study documents the successful application of the gravity method in mapping suspected buried bedrock valleys at three sites in southwest Michigan. The first site is located in Benton Harbor, Berrien County. Gravity surveys were conducted along the Jean Klock Park as part of an ongoing coastal research study of the Lake Michigan shoreline. Previous Ground Penetrating Radar (GPR) studies at this site had suggested the presence of a buried valley. The results of the gravity survey confirmed the existence of a buried valley approximately 30--40 m deep and at least 2,000 m wide, which is in good agreement with information from drill cores suggesting a possible ancient river system. A detailed gravity survey was conducted at the second site located in Schoolcraft Township, Kalamazoo County, where the heavy use of pesticides has resulted in the contamination of the upper aquifers. Preliminary results suggest the presence of a broad shallow valley at least 25 m deep. Gravity surveys at the third site located southeast of the Kavco Landfill, Barry County also suggests the presence of a buried valley oriented NE-SW, confirming the interpretations of an earlier electrical resistivity study. It is possible that this channel controls groundwater flow and facilitates the transport of contaminants from the landfill to the surrounding areas.
- OSTI ID:
- 6949969
- Report Number(s):
- CONF-9404217--
- Conference Information:
- Journal Name: Geological Society of America, Abstracts with Programs; (United States) Journal Volume: 26:5
- Country of Publication:
- United States
- Language:
- English
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