"Modified from Regional Geologic Map Series, Indiana Geological Survey." Includes insets of "Thickness of unconsolidated materials" and "Distribution of surface tills."
Imprint: [Bloomington, Ind.] : The Survey, 1979.
Dimensions: 31 x 22 cm; Scale: 1:1,900,000
Coordinates: W0880500 W0844700 N0414500 N0374600