The Illinois Basin is one of the premier sites for evaluating technologies for Carbon Capture and Storage (CCS). As a result, a wealth of new geophysical and geological subsurface data has been acquired, including long-record, high-resolution common depth-point (CDP) seismic reflection profiles. These profiles provide the clearest-yet images of Precambrian basement beneath the Illinois Basin. The purpose of our study is to present and describe basement structure from a subset of these profiles with reference to how they constrain the interpretation of previously proposed Precambrian terranes beneath the basin.
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