Farmdalian Interstade, Iowa, Paleoclimatology, Paleoecology, pine, pollen, spruce
Pollen analysis of the Butler Farm buried peat in east-central Iowa suggests that a spruce-pine forest grew in the area during the Farmdalian Substage. Pine decreased and spruce increased in dominance as the peat accumulated. Radiocarbon dates indicate that the peat was deposited from 28,800 to 22,750 RCYBP. It is overlain by late Wisconsinan loess and underlain by a Sangamon paleosol developed on Illinoian till. The regional pollen data suggest a general cooling trend through Farmdale time.
Proceedings of the Iowa Academy of Science
©1980 Iowa Academy of Science, Inc.
Van Zant, Kent L.; Hallberg, George R.; and Baker, Richard G.
"A Farmdalian Pollen Diagram From East-Central Iowa,"
Proceedings of the Iowa Academy of Science, 87(2), 52-55.
Available at: https://scholarworks.uni.edu/pias/vol87/iss2/6