This preliminary map is an interim geologic map product prepared to document progress accomplished during the second year of a multiyear project to map the bedrock geology of Morgan County, Indiana. The Hall quadrangle is located in the northwestern portion of the county where the oldest rock units subcrop in paleovalleys filled with glacial outwash deposits. All the outcropping and subcropping rocks in the map area are assigned to the Lower and Middle Mississippian Borden and Sanders Groups---in ascending order, the informal upper division of the Spickert Knob Formation, Edwardsville Formation, and Ramp Creek Formation.
Rupp, R. F., McLaughlin, P. I., Bancroft, A. M., Hasenmueller, W. A., and Johnson, M. R., 2017, Preliminary map showing bedrock geology of the Hall 7.5-minute quadrangle, Indiana: Indiana Geological Survey Open-File Study 17-01, scale 1:24,000.
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Keywords: Borden Group, Sanders Group, Spickert Knob Formation, Edwardsville Formation, Ramp Creek Formation, map, Morgan County, Hall quadrangle
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