Bedrock topography of northeast Iowa

IMAP 933
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Abstract

The bedrock in Iowa (Hershey, 1969) is generally overlain by deposits of glacial drift and alluvium, which range in thickness from less than 1 foot (0.3 m) to more than 400 ft (18 m), respectively. The configuration of the bedrock surface is the result of a complex system of ancient drainage courses when were developed during a long period of preglacial erosion and during shorter, but more intense, periods of interglacial erosion. 

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Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Bedrock topography of northeast Iowa
Series title IMAP
Series number 933
DOI 10.3133/i933
Year Published 1975
Language English
Publisher U.S. Geological Survey
Publisher location Iowa City, IA
Contributing office(s) Iowa Water Science Center
Description 2 plates: 27.49 x 47.04 inches and 30.91 x 47.01 inches
Country United States
State Iowa
Scale 25000
Online Only (Y/N) N
Additional Online Files (Y/N) N
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