Plant and Insect Remains from the Wisconsinan Interstadial/Stadial Transition at Wedron, North-Central Illinois
Abstract Organic material exposed within a small swale fill in Pit 6 of the Wedron Silica Sand Co. near Wedron in LaSalle County, Illinois, includes well-preserved pollen, plant macrofossils, and insect remains. This material occurs in slackwater sediment in the lower part of the Peddicord Formation...
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Cambridge University Press (CUP)
1990
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crcambridgeupr:10.1016/0033-5894(90)90064-r 2024-09-15T18:04:50+00:00 Plant and Insect Remains from the Wisconsinan Interstadial/Stadial Transition at Wedron, North-Central Illinois Garry, Clarke E. Schwert, Donald P. Baker, Richard G. Kemmis, Tim J. Horton, Diana G. Sullivan, Amy E. 1990 http://dx.doi.org/10.1016/0033-5894(90)90064-r http://api.elsevier.com/content/article/PII:003358949090064R?httpAccept=text/xml http://api.elsevier.com/content/article/PII:003358949090064R?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400020718 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 33, issue 3, page 387-399 ISSN 0033-5894 1096-0287 journal-article 1990 crcambridgeupr https://doi.org/10.1016/0033-5894(90)90064-r 2024-07-31T04:04:35Z Abstract Organic material exposed within a small swale fill in Pit 6 of the Wedron Silica Sand Co. near Wedron in LaSalle County, Illinois, includes well-preserved pollen, plant macrofossils, and insect remains. This material occurs in slackwater sediment in the lower part of the Peddicord Formation, which was deposited as existing valleys were dammed by fluvial aggradation during the initial late Wisconsinan advance of Laurentide ice into the Wedron area. Wood from the organic horizon has a radiocarbon age of 21,460 ± 470 yr B.P. (ISGS-1486). The pollen spectrum is dominated by Picea, Pinus , and Cyperaceae. Plant macrofossils comprise a mix of boreal-forest taxa, including Picea, Larix laricina , and the moss Campylium stellatum subarctic species including Betula glandulosa, Empetrum nigrum , and Selaginella selaginoides along with the predominantly arctic Vaccinium uliginosum var. alpinum, Dryas integrifolia , and Rhododendron lapponicum . The insect fauna contains the western montane ground beetle Opisthius richardsoni several arctic-subarctic ground beetles including Diacheila polita, Helophorus sibiricus , and Pterostichus (Cryobius) caribou and a diverse assemblage of insects that today inhabit the boreal forest. We interpret the biotic record to record a phase in the transition from closed boreal forest to open tundra as climatic conditions deteriorated in advance of continental glaciation. Article in Journal/Newspaper Empetrum nigrum Subarctic Tundra Cambridge University Press Quaternary Research 33 3 387 399 |
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Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract Organic material exposed within a small swale fill in Pit 6 of the Wedron Silica Sand Co. near Wedron in LaSalle County, Illinois, includes well-preserved pollen, plant macrofossils, and insect remains. This material occurs in slackwater sediment in the lower part of the Peddicord Formation, which was deposited as existing valleys were dammed by fluvial aggradation during the initial late Wisconsinan advance of Laurentide ice into the Wedron area. Wood from the organic horizon has a radiocarbon age of 21,460 ± 470 yr B.P. (ISGS-1486). The pollen spectrum is dominated by Picea, Pinus , and Cyperaceae. Plant macrofossils comprise a mix of boreal-forest taxa, including Picea, Larix laricina , and the moss Campylium stellatum subarctic species including Betula glandulosa, Empetrum nigrum , and Selaginella selaginoides along with the predominantly arctic Vaccinium uliginosum var. alpinum, Dryas integrifolia , and Rhododendron lapponicum . The insect fauna contains the western montane ground beetle Opisthius richardsoni several arctic-subarctic ground beetles including Diacheila polita, Helophorus sibiricus , and Pterostichus (Cryobius) caribou and a diverse assemblage of insects that today inhabit the boreal forest. We interpret the biotic record to record a phase in the transition from closed boreal forest to open tundra as climatic conditions deteriorated in advance of continental glaciation. |
format |
Article in Journal/Newspaper |
author |
Garry, Clarke E. Schwert, Donald P. Baker, Richard G. Kemmis, Tim J. Horton, Diana G. Sullivan, Amy E. |
spellingShingle |
Garry, Clarke E. Schwert, Donald P. Baker, Richard G. Kemmis, Tim J. Horton, Diana G. Sullivan, Amy E. Plant and Insect Remains from the Wisconsinan Interstadial/Stadial Transition at Wedron, North-Central Illinois |
author_facet |
Garry, Clarke E. Schwert, Donald P. Baker, Richard G. Kemmis, Tim J. Horton, Diana G. Sullivan, Amy E. |
author_sort |
Garry, Clarke E. |
title |
Plant and Insect Remains from the Wisconsinan Interstadial/Stadial Transition at Wedron, North-Central Illinois |
title_short |
Plant and Insect Remains from the Wisconsinan Interstadial/Stadial Transition at Wedron, North-Central Illinois |
title_full |
Plant and Insect Remains from the Wisconsinan Interstadial/Stadial Transition at Wedron, North-Central Illinois |
title_fullStr |
Plant and Insect Remains from the Wisconsinan Interstadial/Stadial Transition at Wedron, North-Central Illinois |
title_full_unstemmed |
Plant and Insect Remains from the Wisconsinan Interstadial/Stadial Transition at Wedron, North-Central Illinois |
title_sort |
plant and insect remains from the wisconsinan interstadial/stadial transition at wedron, north-central illinois |
publisher |
Cambridge University Press (CUP) |
publishDate |
1990 |
url |
http://dx.doi.org/10.1016/0033-5894(90)90064-r http://api.elsevier.com/content/article/PII:003358949090064R?httpAccept=text/xml http://api.elsevier.com/content/article/PII:003358949090064R?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400020718 |
genre |
Empetrum nigrum Subarctic Tundra |
genre_facet |
Empetrum nigrum Subarctic Tundra |
op_source |
Quaternary Research volume 33, issue 3, page 387-399 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/0033-5894(90)90064-r |
container_title |
Quaternary Research |
container_volume |
33 |
container_issue |
3 |
container_start_page |
387 |
op_container_end_page |
399 |
_version_ |
1810442440054669312 |