Interpreting basal sediments and plant fossils in kettle lakes: insights from Silver Lake, Michigan, USA
We report on pollen, plant macrofossils, and associated lithostratigraphy of a sediment core extracted from the base of Silver Lake, a kettle lake in northern Lower Michigan, USA, which reveal a complex deglacial scenario for ice block melting and lake formation, and subsequent plant colonization. C...
Published in: | Canadian Journal of Earth Sciences |
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crcansciencepubl:10.1139/cjes-2018-0338 2023-12-17T10:31:48+01:00 Interpreting basal sediments and plant fossils in kettle lakes: insights from Silver Lake, Michigan, USA Yansa, Catherine H. Fulton, Albert E. Schaetzl, Randall J. Kettle, Jennifer M. Arbogast, Alan F. 2020 http://dx.doi.org/10.1139/cjes-2018-0338 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjes-2018-0338 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjes-2018-0338 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 57, issue 2, page 292-305 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2020 crcansciencepubl https://doi.org/10.1139/cjes-2018-0338 2023-11-19T13:39:09Z We report on pollen, plant macrofossils, and associated lithostratigraphy of a sediment core extracted from the base of Silver Lake, a kettle lake in northern Lower Michigan, USA, which reveal a complex deglacial scenario for ice block melting and lake formation, and subsequent plant colonization. Complementary multivariate statistical and squared chord distance analyses of the pollen data support these interpretations. The basal radiocarbon age from the core (17 540 cal years BP) is rejected as being anomalously old, based on biostratigraphic anomalies in the core and the date’s incongruity with respect to the accepted regional deglaciation chronology. We reason that this erroneous age estimate resulted from the redeposition of middle-Wisconsin-age fossils by the ice sheet, mixed with the remains of plants that existed as the kettle lake formed at ca. 10 940 cal years BP by ice block ablation. Thereafter, the kettle lake became a reliable repository of Holocene-age fossils, documenting a mature boreal forest that existed until 10 640 cal years BP, followed by a pine-dominated mixed forest, an early variant of the mixed conifer–hardwood forest that persists to the present day. Our study demonstrates that researchers investigating kettle lakes, a common depositional archive for plant fossils in deglaciated landscapes, should exercise caution in interpreting the basal (Late Pleistocene/early Holocene-age) part of lake sediment cores. Article in Journal/Newspaper Ice Sheet Canadian Science Publishing (via Crossref) Canadian Journal of Earth Sciences 57 2 292 305 |
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Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
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English |
topic |
General Earth and Planetary Sciences |
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General Earth and Planetary Sciences Yansa, Catherine H. Fulton, Albert E. Schaetzl, Randall J. Kettle, Jennifer M. Arbogast, Alan F. Interpreting basal sediments and plant fossils in kettle lakes: insights from Silver Lake, Michigan, USA |
topic_facet |
General Earth and Planetary Sciences |
description |
We report on pollen, plant macrofossils, and associated lithostratigraphy of a sediment core extracted from the base of Silver Lake, a kettle lake in northern Lower Michigan, USA, which reveal a complex deglacial scenario for ice block melting and lake formation, and subsequent plant colonization. Complementary multivariate statistical and squared chord distance analyses of the pollen data support these interpretations. The basal radiocarbon age from the core (17 540 cal years BP) is rejected as being anomalously old, based on biostratigraphic anomalies in the core and the date’s incongruity with respect to the accepted regional deglaciation chronology. We reason that this erroneous age estimate resulted from the redeposition of middle-Wisconsin-age fossils by the ice sheet, mixed with the remains of plants that existed as the kettle lake formed at ca. 10 940 cal years BP by ice block ablation. Thereafter, the kettle lake became a reliable repository of Holocene-age fossils, documenting a mature boreal forest that existed until 10 640 cal years BP, followed by a pine-dominated mixed forest, an early variant of the mixed conifer–hardwood forest that persists to the present day. Our study demonstrates that researchers investigating kettle lakes, a common depositional archive for plant fossils in deglaciated landscapes, should exercise caution in interpreting the basal (Late Pleistocene/early Holocene-age) part of lake sediment cores. |
format |
Article in Journal/Newspaper |
author |
Yansa, Catherine H. Fulton, Albert E. Schaetzl, Randall J. Kettle, Jennifer M. Arbogast, Alan F. |
author_facet |
Yansa, Catherine H. Fulton, Albert E. Schaetzl, Randall J. Kettle, Jennifer M. Arbogast, Alan F. |
author_sort |
Yansa, Catherine H. |
title |
Interpreting basal sediments and plant fossils in kettle lakes: insights from Silver Lake, Michigan, USA |
title_short |
Interpreting basal sediments and plant fossils in kettle lakes: insights from Silver Lake, Michigan, USA |
title_full |
Interpreting basal sediments and plant fossils in kettle lakes: insights from Silver Lake, Michigan, USA |
title_fullStr |
Interpreting basal sediments and plant fossils in kettle lakes: insights from Silver Lake, Michigan, USA |
title_full_unstemmed |
Interpreting basal sediments and plant fossils in kettle lakes: insights from Silver Lake, Michigan, USA |
title_sort |
interpreting basal sediments and plant fossils in kettle lakes: insights from silver lake, michigan, usa |
publisher |
Canadian Science Publishing |
publishDate |
2020 |
url |
http://dx.doi.org/10.1139/cjes-2018-0338 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjes-2018-0338 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjes-2018-0338 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Canadian Journal of Earth Sciences volume 57, issue 2, page 292-305 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjes-2018-0338 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
57 |
container_issue |
2 |
container_start_page |
292 |
op_container_end_page |
305 |
_version_ |
1785585201712201728 |