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Bedrock topography of south-central Iowa

IMAP 763

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Abstract

The bedrock surface 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 bedrock surface is the result of a complex system of ancient drainage courses, which were developed during the long period of preglacial erosion and during shorter, but more intense, periods of interglacial erosion.

Study Area

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Bedrock topography of south-central Iowa
Series title:
IMAP
Series number:
763
Year Published:
1973
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Iowa City
Contributing office(s):
Iowa Water Science Center
Description:
1 map :col. ;83 x 124.
Country:
United States
State:
Iowa
Scale:
25000
Online Only (Y/N):
N
Additional Online Files (Y/N):
N