The Iowan Terrace and Terrace Soils of the Nishnabotna Valley in Western Iowa

Authors

J. F. Corliss, Iowa State College
R. V. Ruhe, Iowa State CollegeFollow

Document Type

Research

Abstract

Smith and Riecken (1947) in their revision of the Iowan-drift border in northwestern Iowan, extended a sublobe of the Iowandrift southward to near Roselle and Halbur in Carroll County. During field studies in Carroll County in 1953, the margin of the Iowan-drift sublobe was found to extend as far southward as Manning and Templeton in Carroll County (Figure 1). The Iowan drift is delineated from the loess-mantled Kansan drift on the basis of four lines of evidence: (1) in topographic positions that preclude significant erosion on the Iowan-drift surface, calcareous loess overlies calcareous till. (2) In topographic positions that preclude significant erosion on the Kansan-drift surface, calcareous loess overlies a leached, buried soil in the uppermost part of the Kansan till. (3) An abrupt change in topography occurs at the margin of the Iowan-drift. (4) A discontinuity in loess thickness occurs at the margin of the Iowan-drift.

Publication Date

1955

Journal Title

Proceedings of the Iowa Academy of Science

Volume

62

Issue

1

First Page

345

Last Page

360

Copyright

©1955 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

Recommended Citation

Corliss, J. F. and Ruhe, R. V. (1955) "The Iowan Terrace and Terrace Soils of the Nishnabotna Valley in Western Iowa," Proceedings of the Iowa Academy of Science, 62(1), 345-360.
Available at: https://scholarworks.uni.edu/pias/vol62/iss1/37