38713
Hasenmueller, Walter A., Rupp, Robin F.
2017
MM97
Hasenmueller, W. A., and Rupp, R. F., 2017, Map showing elevation of the bedrock surface in Bartholomew County, Indiana: Indiana Geological Survey Miscellaneous Map 97, scale 1:48,000.
Indiana Geological & Water Survey - Miscellaneous Map 97
Abstract:
"The computer-derived contours and color ramp shown on this map show the shape of the bedrock surface in Bartholomew
County. The shaded relief on the map shows the modern topography. The bedrock surface is the surface that marks
the top of lithified rock. In Bartholomew County, and throughout Indiana, the bedrock surface is the erosional top
of Paleozoic sedimentary rocks. Typically covered by soils or much younger (Quaternary or Tertiary) deposits of
unconsolidated sediment, it is locally visible at natural outcrops of bedrock or in man-made excavations that penetrate
bedrock. The position of the bedrock surface is economically important because it marks the abrupt transition from
easily excavated unconsolidated sediments into solid bedrock and because it limits the lateral and vertical extent of
economically important bedrock units."
Marker lat / long: 39.216922, -85.89607 (WGS84)