thumbnail

Bedrock topography of northeast Iowa

IMAP 933

By:

Links

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. 

Study Area

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Bedrock topography of northeast Iowa
Series title:
IMAP
Series number:
933
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