Chicago East Quadrangle bedrock mapping

Status Start Date End Date Locations
Active Sep 15, 2020 Sep 14, 2021 Jasper, Lake, Newton, Porter
Director: Patrick McLaughlin
Other Researchers: Chris Dintaman, Matthew Johnson, Rebecca Meyer, Katherine Tucker
Funding: U.S. Geological Survey (USGS) - STATEMAP Program
Issue: Develop 1:100,000 scale geologic maps for all of Indiana to support the informed stewardship of natural resources.
Objective: Generate a bedrock geologic map for the Indiana portion of the 1:100,000 scale Chicago East Quadrangle and advance understanding of the buried Silurian-Devonian bedrock aquifer and confining Maquoketa and New Albany shale-dominate units in this area.
Approach: Through the focused study of an abundance of little-known archieved drill cores from this northwestern corner of Indiana, and comparative analysis of associated subsurface data, generate a detailed geologic map of the bedrock geology and an associated geo-database. The combination of bio- and chemostratigraphy together with facies analysis will advance the accuracy of chronostratigraphic correlation for the improved modeling and paleogeography and sedimentation for the improved modeling of map unit contacts and properties away from control points.
Products: Published bedrock geologic map for the Indiana portion of the 1:100,000-scale Chicago East Quadrangle and associated geo-database.
Benefits: The results of this study will provide new information on the bedrock geology of one of the most densely populated portions of Indiana. Continued growth in the Chicago metropolitan area has put a great pressure on aggregate and groundwater resources and these map products will provide new insights into the natural resources of the area to advance their utilization.