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

Item Number: OFS15-06
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 Hope 7.5-minute quadrangle is located just within the maximum extent of the Wisconsin Episode of the Laurentide Ice Sheet and contains glacial sediments of both the Wisconsin and Illinois Episode glaciations. The quadrangle is dominated by silt- and clay-rich diamicton (till) units of both glacial episodes and sand and gravel (outwash) up to 100 ft thick on the eastern flank of a bedrock paleovalley extending roughly north-south along the western edge of the quadrangle. Quaternary sediment thickness ranges from zero to more than 100 ft, with the thickest Quaternary sediment associated with an upland in the far northwestern part of the quadrangle; the upland is cored by Illinois and perhaps pre-Illinois Episode glacial sediments and draped with Wisconsin Episode till. In the eastern two-thirds of the quadrangle, Wisconsin and Illinois Episode tills (total thickness less than 40 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 Hope 7.5-minute quadrangle, Indiana: Indiana Geological Survey Open-File Study 15-06, scale 1:24,000.


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Keywords: Laurentide Ice Sheet, Quaternary, glacial deposits

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