Status of the Pleistocene Wisconsin Stage in Central North America

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Science  01 Feb 1963:
Vol. 139, Issue 3553, pp. 402-404
DOI: 10.1126/science.139.3553.402


A brief review of the history of the Wisconsin Stage in Pleistocene stratigraphy and of research since 1950 shows that post-Sangoman glacial drift older than the Wisconsin drift reported in the older literature is present in central North America. Known and possible stratigraphic positions of the relevant units are shown.