UPPER BLOCK COAL --
Coal Mines in Indiana in the Upper Block Coal, 2000 (1:24,000)
Shows the locations and extents of underground mines in the Upper Block Coal
Member for the period from the mid-1800s to 2000.
Derived from the Indiana Coal Mine Information System (CMIS). Original source
information includes company mine maps, field maps and notes of IGS geologists,
IGS publications, Indiana State Mine Inspector Reports, several series of aerial
photographs, and U.S. Geological Survey 7.5-minute quadrangle maps.
FGDC metadata: COAL_MINE_SEAMS_UPPER_BLOCK_IN