Description: In the past a series of reports on coal resources of selected counties in Indiana was published as part of the Special Report series of the Indiana Geological
Survey. These reports included maps showing thickness of the Seelyville Coal Member (Linton Formation, Pennsylvanian). The thickness maps were based on coal-test
records, mine-map notations, and interpretations of geophysical logs that are included in the files of the Indiana Geological Survey. Different thickness ranges were
used in the various counties and for different purposes.
Since 1980, staff members of the Indiana Geological Survey (IGS) have also collected and entered coal resource information into the NCRDS database as a cooperative
project with the U.S. Geological Survey (USGS). The purpose of NCRDS database is to provide a means of rapid retrieval of point-source coal resource information,
including coal location, thickness, depth, and other parameters. Based on all available data as of October 2010, a new map of Seelyville Coal Member thickness was
created. It is the most current thickness map of the Seelyville Coal Member. Because additional data on coal thicknesses are obtained by the Indiana Geological
Survey on an annual basis, interested users may wish to contact the Indiana Geological Survey for information on these more up-to-date sources.