Pollen and macrofossil profiles from six cores in Illinois, U.S.A, supplement to: Grüger, Eberhard (1972): Pollen and seed studies of Wisconsinan vegetation in Illinois, U.S.A. Geological Society of America Bulletin, 83(9), 2715-2734

Eberhard Grüger
Pollen analysis of Wisconsinan sediments from eleven localities in northern and central Illinois, combined with the results of older studies, allows a first general survey of the vegetational changes in Illinois during the last glaciation.In the late Altonian (after 40,000 B.P.), pine was already the most prevalent tree type in northern Illinois. Probably because of the influence of the last Altonian ice advance to northern Illinois, pine migrated to the south and reached south-central Illinois,...
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