(1976) A Late-Glacial Pollen Sequence from Northeastern Iowa; Sumner Bog Revisited, July 1976. University of Iowa
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Abstract
Palynologic stratigraphic and radiocarbon evidence indicate the presence of a hiatus with the sediments of Sumner Bog, Bremer County, Iowa. This changes previously and erosion and weathering ensued at the bog during the mid-postglacial. The pollen evidence indicates that during the late glacial a closed coniferous forest composed of abundant spruce and larch trees replaced an open forest vegetation which still contained spruce and larch tree but fir pollen within both of these pollen assemblages suggests that fir tress were only a minor constituent of the vegetation
| Item Type: | Departmental Report |
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| Keywords: | Investigative Reports, aeromagnetic maps, subsurface rock, gravity data, groundwater |
| Subjects: | Natural resources and environment Natural resources and environment > Earth sciences Natural resources and environment > Maps and gazetteers |
| ID Code: | 26453 |
| Deposited By: | Margaret Barr |
| Deposited On: | 29 Jan 2018 19:12 |
| Last Modified: | 29 Jan 2018 19:12 |
| URI: | https://publications.iowa.gov/id/eprint/26453 |