INTRODUCTION: A part of this data base was originally compiled during research on the Trenton Limestone by Brian D. Keith. Because of increased interest by the petroleum industry in deeper subsurface units in Indiana, we have expanded the data base and made it available by publication. This data base is a part of the computerized subsurface file of the Petroleum Section of the Indiana Geological Survey. The data base in the Petroleum Section contains pertinent information from all known records associated with petroleum-related wells in Indiana. This deep-well data base includes only wells that have penetrated the Black River Group of deeper stratigraphic units in Indiana. We intend to update the deep-well data base once a year. This updated data base will be available from the Geological Survey as an annual addendum to this report.
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