Bedrock topography of northeast Iowa
IMAP
933
By: Robert E. Hansen
Links
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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.
Suggested Citation
Hansen, R.E., 1975, Bedrock topography of northeast Iowa: U.S. Geological Survey IMAP 933, 2 plates: 27.49 x 47.04 inches and 30.91 x 47.01 inches, https://doi.org/10.3133/i933.
Study Area
| 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 |