The line marking the position of the maximum advance of the Kansan ice sheet in northeastern Kansas has been established by investigators at various places as lying either north or south of Kansas or Kaw River. The earlier maps show the drift border as being south of the river and extending at least as far south as 38° 50' north latitude. Of the more recent work that done by Todd not only represents the latest but also the most thorough. This investigator locates the edge of the Kansan ice sheet as lying north of the Kaw River valley from a point midway between Lecompton and Lawrence to Kansas City, Kansas. See heavy continuous line, figure 1. This line separating the glaciated from the unglaciated area in Kansas is essentially the one adopted by the Kansas Geological Survey and published on its more recent maps.
Proceedings of the Iowa Academy of Science
©1922 Iowa Academy of Science, Inc.
Schoewe, Walter H.
"Till-Like Deposits South of Kansas River in Douglas County, Kansas,"
Proceedings of the Iowa Academy of Science, 29(1), 61-65.
Available at: https://scholarworks.uni.edu/pias/vol29/iss1/9