File:104-Figure 4a.jpg: Revision history

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    19 April 2016

    • curprev 15:5715:57, 19 April 2016Illex-gron talk contribs 169 bytes +169 Figure 4a -- Lobe and sublobe boundaries in Illinois during the last glaciation (from Willman and Frye 1970). Locations of the ancient Mississippi and Iowa Rivers added.