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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
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Bedrock topography of south-central Iowa |
| Series title | IMAP |
| Series number | 763 |
| DOI | 10.3133/i763 |
| 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 |
| Google Analytic Metrics | Metrics page |