Bedrock topography of west-central Iowa
IMAP
1688
By: R.E. Hansen and D. L. Runkle
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Abstract
Bedrock in Iowa (Hershey 1969) generally is overlain by deposits of glacial drift and alluvium. The drift, consisting of glacial till and glacial outwash, ranges in thickness from zero to more than 500 feet in western Iowa; the alluvium in stream valleys ranges in thickness from less than 1 to more than 70 feet. The configuration of the bedrock surface is the result of a long period of preglacial erosion and during shorter, but more intense, periods of interglacial erosion. This map, for a 12-county area in west-central Iowa, is the eighth of a series of nine reports that will provide statewide coverage of the bedrock topograhy of Iowa.
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Bedrock topography of west-central Iowa |
| Series title | IMAP |
| Series number | 1688 |
| DOI | 10.3133/i1688 |
| Year Published | 1986 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Iowa Water Science Center |
| Description | 2 Plates: 32.96 x 42.09 inches and 31.49 x 42.41 inches |
| Country | United States |
| State | Iowa |
| Scale | 25000 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |