Barbara Hill
Geological Research at the IGS

Extent, characteristics, and regional relations of the interlobate region in north-central Indiana

Status Start Date End Date Locations
completed Sep 30, 2013 Sep 1, 2017 Allen, Elkhart, Kosciusko, Lagrange, Lake, LaPorte, Marshall, Porter, St Joseph, Steuben,
Whitley
Director: Henry Loope
Other Researchers: Deborah DeChurch, Barbara Hill, Matthew Johnson Timothy Fisher, University of Toledo
Funding: U.S. Geological Survey (USGS) - Great Lakes Geologic Mapping Coalition
Issue: Current knowledge of sedimentology and stratigraphy of the differing ice lobes in the interlobate region in Indiana is fragmented. A clear understanding of the stratigraphy, extent, and chronology of each lobe will improve the quality of mapping northern Indiana.
Objective: This project aims to develop an understanding of the physical properties, stratigraphic relations, and boundary conditions of the Saginaw, Huron-Erie, and Lake Michigan lobes
Approach: Data includes water-well, project testholes, and gamma-ray logs to determine stratigraphy and construct cross-sections. Sediment samples from cores will be analysed for sedimentological and mineralogical properties. Individual samples will be collected, where possible, for chronological analysis.
Products: Products will include a project database of stratigraphy and chronology, regional cross-sections, and geologic maps
Benefits: Detailed knowledge of the interlobate sediments will enhance geologic mapping in the region. The interlobate area is dominated by coarse-grained sediments and contains the most prolific groundwater resources in the state. Enhanced knowledge will aid regional plannin, wellfield development,and groundwater remediation activities.

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