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Holocene Vegetational Changes In Eastern Iowa, R. G. Baker, C. A. Chumbley, P. M. Witinok, H. K. Kim
Holocene Vegetational Changes In Eastern Iowa, R. G. Baker, C. A. Chumbley, P. M. Witinok, H. K. Kim
Journal of the Iowa Academy of Science: JIAS
Pollen and plant macrofossil analysis from three sites along an east-west transect in southeastern Iowa provide evidence for Holocene vegetational development. Colo Marsh at the west end of the transect is relatively complete, with a late-glacial spruce zone ending about 11,500 yr B.P.; a deciduous forest zone from about 11,500 to 8300; a prairie zone from 8300 to 4500, and prairie with oak from 4500 to presettlement times.
Sediments from the site at the Indian Creek Nature Center, midway in the transect, date only from about 6000 to 1600 yrs B. P. This site also was dominantly prairie from 6000 …