A definite moraine extends southeastward across the southwestern township of Butler County to central northern Grundy County where it swings to the northeast passing north of Cedar Falls and southward (less distinct here) along the Cedar River and just east of it to Vinton. East of Vinton it crosses the river and extends southward along the eastern part of Benton County and thence toward the east. Similar deposits in several other places have been recognized as possible recessional moraines.
Proceedings of the Iowa Academy of Science
©1924 Iowa Academy of Science, Inc.
Smith, John E.
"Some Theoretical Stages in the Retreat of the Iowan Ice Sheets,"
Proceedings of the Iowa Academy of Science, 31(1), 335-335.
Available at: https://scholarworks.uni.edu/pias/vol31/iss1/101