Preliminary map showing Quaternary geology of the Elizabethtown 7.5-minute quadrangle, Indiana (2015)

Item Number: OFS15-05
Map Scale: 1:24,000
Price $12.50
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We suggest that you have this map shipped rolled in a tube, as it is printed on heavy paper and will crack if folded.

Authors: Henry Loope

The Elizabethtown 7.5-minute quadrangle is located immediately adjacent to the maximum extent of the Wisconsin Episode of the Laurentide Ice Sheet and contains glacial sediments of the Wisconsin, Illinois, and pre-Illinois Episode glaciations. The surficial geology of the quadrangle is dominated by silt- and clay-rich diamicton (till) of the Wisconsin Episode and sand and gravel (outwash) up to 30 ft thick along the western edge of the quadrangle. A deep (Quaternary sediment thickness up to 130 ft) bedrock paleovalley is present along the western edge of the quadrangle and trends north-south. The paleovalley preserves an older sequence of glacial deposits (till and outwash) related to the Illinois and pre-Illinois Episodes. In the eastern two-thirds of the quadrangle, Wisconsin and Illinois Episode tills (total thickness less than 50 ft) lie on a southwestward sloping bedrock surface. This preliminary geologic map is an interim geologic map product that documents progress in mapping the Quaternary geology of Bartholomew County, Indiana. The lithologic classification of the Quaternary units of Indiana (Wayne, 1963) was used in assigning map units.



Loope, H. M., 2015, Preliminary map showing Quaternary geology of the Elizabethtown 7.5-minute quadrangle, Indiana: Indiana Geological Survey Open-File Study 15-05, scale 1:24,000.


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Keywords: Quaternary, glacial deposits, Laurentide Ice Sheet

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