The southern extent of the Kansan glacier in Douglas County, Kansas is marked by a series of discontinuous outcrops of boulder beds, comprised of erratics in a modified terminal-like morainal topography. The Clearfield tongue (SW¼ sec. 16, T. 14 S., R. 21 E.) extended as far south as 38° 51′ latitude. Most of the material left by the glacier is outwash or reworked till and this material along with the boulder beds is definitive for marking the southern extent of the glacier. Although subdued, the Pleistocene deposits modify the local landscape and are important in piecing together the late geologic history of the region.
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Vol. 106 • No. 1