BEDROCK ELEVATION (FT) --
Bedrock Topography, 1982 (1:500,000)
Shows contours that define the elevation (feet above sea level) of the bedrock surface in Indiana. Contour interval is 50 feet.
Digitized and modified from the following published paper map: Indiana Geological Survey Miscellaneous Map 36.
FGDC metadata: BEDROCK_TOPOGRAPHY_MM36_IN