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Document Type

Research

Keywords

Palynology, Quaternary, Farmdalian, Paleoclimatology, Paleocology

Abstract

Core samples of peat from beneath Wisconsinian loess in Des Moines County, Iowa, were analyzed for pollen. The pollen sequence, dating from 24,900 to 28,720 RCYBP (radiocarbon years before present), was divided into 2 zones based on relative pollen percentages and pollen concentration. Zone B, at the base of the peat, is dominated by Pinus and Picea and is interpreted to represent a closed-coniferous forest, comparable to the modern boreal forest. Zone A, at the very top of the peat, is marked by the decline of Pinus and the increased importance of Picea. This is a regional event which marks the change to the late-glacial Picea forest which was devoid of Pinus.

Publication Date

June 1980

Journal Title

Proceedings of the Iowa Academy of Science

Volume

87

Issue

2

First Page

41

Last Page

44

Copyright

© Copyright 1980 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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