Stratigraphy and chronology of the Pleistocene Glacial Lake Patoka, south central Indiana

Status Start Date End Date Locations
Active Oct 1, 2019 Oct 1, 2020 Dubois
Director: Jose Luis Antinao
Other Researchers: Henry Gray, Peter Jacobs, Henry Loope, Drew Packman, Robin Rupp
Funding: Indiana University - Indiana Geological & Water Survey
Issue: In south central Indiana, an understanding of the pre-Wisconsin ice-marginal stratigraphy and chronology of events is needed to develop a model for distribution of Pleistocene sediments and of the paleoenvironments where they were deposited.
Objective: The goal of this study is to combine existing stratigraphic, mineralogic and geophysical data and current interpretations by Dr. Gray, to new datasets to be produced during the study (from shallow coring, geochronology, passive seismic data) in order to develop a litho- and chronostratigraphic framework of the GLP area.
Approach: Previous data will be compiled digitally in the same Petra database structure being used for our Statemap efforts. Data from two shallow/intermediate depth cores taken in the late 1970s by Gray and Bassett near Jasper have been digitized, and incorporated into our own database that includes digital lithological datasets (former ILith, now in Petra). We will complete a sequence of five Geoprobe test borings to check critical stratigraphic contacts and to get 8 OSL samples. Collaborator Jacobs will characterize soils evolution based on analyses from core samples. Cross sections will be generated directly from Petra, and will support elaboration of a manuscript by Grey and the team.
Products: A manuscript for IJES will be prepared by Gray with support of the team, on the stratigraphy and chronology of the GLP area. The product will include maps and cross sections.
Benefits: Execution of this project not only will inform ideas and hypotheses about paleoclimate conditions in the continent during pre-Wisconsin times, but in some places where these sediments form aquifers, it will help determine extension of sedimentary units that are critical to human activities.