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Publication Extents

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Bedrock topography of southeast Iowa
Robert E. Hansen
1973, IMAP 808
The bedrock in Iowa is covered nearly everywhere by unconsolidated deposits of glacial drift and alluvium, which range in thickness from less than 1 foot to more than 400 feet, and from less than 1 foot to about 60 feet, respectively. The configuration of the bedrock surface is the result...