Olympia Interstadial: vegetation, landscape history, and paleoclimatic implications of a mid-Wisconsinan (MIS3) nonglacial sequence from southwest British Columbia, Canada
Lithostratigraphic, 14 C, and palynologic analyses of peat and silty peat at three nearby sites reveal a 25 000 year vegetation and climate history of the Olympia Interstade for the Fraser Lowland, British Columbia, 300 km within the southern limit of the Cordilleran Ice Sheet. At Lynn Valley, Polyp...
Published in: | Canadian Journal of Earth Sciences |
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crcansciencepubl:10.1139/cjes-2015-0122 2024-09-15T18:12:30+00:00 Olympia Interstadial: vegetation, landscape history, and paleoclimatic implications of a mid-Wisconsinan (MIS3) nonglacial sequence from southwest British Columbia, Canada Hebda, Richard J. Lian, Olav B. Hicock, Stephen R. Fisher, Timothy G. 2016 http://dx.doi.org/10.1139/cjes-2015-0122 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjes-2015-0122 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjes-2015-0122 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 53, issue 3, page 304-320 ISSN 0008-4077 1480-3313 journal-article 2016 crcansciencepubl https://doi.org/10.1139/cjes-2015-0122 2024-08-01T04:10:00Z Lithostratigraphic, 14 C, and palynologic analyses of peat and silty peat at three nearby sites reveal a 25 000 year vegetation and climate history of the Olympia Interstade for the Fraser Lowland, British Columbia, 300 km within the southern limit of the Cordilleran Ice Sheet. At Lynn Valley, Polypodiaceae fern spores and nonarboreal pollen dominate >47.8 14 C ka BP, reflecting unstable and cold landscapes. A Pinus–Poaceae zone follows, representing pine parkland and cool dry climate. Fluctuating values of Picea and Tsuga mertensiana pollen at Lynn and Seymour valleys and Port Moody characterize most of the Olympia Interstade during local peat deposition in Cyperaceae and Myrica wetlands until about 26.7 14 C ka BP under a cool and moist climate. A brief Pinus – Tsuga heterophylla zone at Lynn Valley 44–39 14 C ka BP suggests a climatic optimum. A Poaceae–Artemisia assemblage and deposition of silty sand after 26.7 14 C ka BP reflect cooling and drying after which a unique Lycopodium assemblage at Lynn Valley suggests cold arid climate and Fraser Glaciation onset. These sequences have no progression to vegetation typical of warm, interglacial, Holocene-like climates, indicating an interstadial not an interglacial interval. Correlation with vegetation changes elsewhere in western North America suggests that the Olympia Interstade started about ∼52 14 C ka BP (∼57 cal ka BP) and ended about 26 14 C ka BP (30 cal ka BP). Article in Journal/Newspaper Ice Sheet Canadian Science Publishing Canadian Journal of Earth Sciences 53 3 304 320 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Lithostratigraphic, 14 C, and palynologic analyses of peat and silty peat at three nearby sites reveal a 25 000 year vegetation and climate history of the Olympia Interstade for the Fraser Lowland, British Columbia, 300 km within the southern limit of the Cordilleran Ice Sheet. At Lynn Valley, Polypodiaceae fern spores and nonarboreal pollen dominate >47.8 14 C ka BP, reflecting unstable and cold landscapes. A Pinus–Poaceae zone follows, representing pine parkland and cool dry climate. Fluctuating values of Picea and Tsuga mertensiana pollen at Lynn and Seymour valleys and Port Moody characterize most of the Olympia Interstade during local peat deposition in Cyperaceae and Myrica wetlands until about 26.7 14 C ka BP under a cool and moist climate. A brief Pinus – Tsuga heterophylla zone at Lynn Valley 44–39 14 C ka BP suggests a climatic optimum. A Poaceae–Artemisia assemblage and deposition of silty sand after 26.7 14 C ka BP reflect cooling and drying after which a unique Lycopodium assemblage at Lynn Valley suggests cold arid climate and Fraser Glaciation onset. These sequences have no progression to vegetation typical of warm, interglacial, Holocene-like climates, indicating an interstadial not an interglacial interval. Correlation with vegetation changes elsewhere in western North America suggests that the Olympia Interstade started about ∼52 14 C ka BP (∼57 cal ka BP) and ended about 26 14 C ka BP (30 cal ka BP). |
author2 |
Fisher, Timothy G. |
format |
Article in Journal/Newspaper |
author |
Hebda, Richard J. Lian, Olav B. Hicock, Stephen R. |
spellingShingle |
Hebda, Richard J. Lian, Olav B. Hicock, Stephen R. Olympia Interstadial: vegetation, landscape history, and paleoclimatic implications of a mid-Wisconsinan (MIS3) nonglacial sequence from southwest British Columbia, Canada |
author_facet |
Hebda, Richard J. Lian, Olav B. Hicock, Stephen R. |
author_sort |
Hebda, Richard J. |
title |
Olympia Interstadial: vegetation, landscape history, and paleoclimatic implications of a mid-Wisconsinan (MIS3) nonglacial sequence from southwest British Columbia, Canada |
title_short |
Olympia Interstadial: vegetation, landscape history, and paleoclimatic implications of a mid-Wisconsinan (MIS3) nonglacial sequence from southwest British Columbia, Canada |
title_full |
Olympia Interstadial: vegetation, landscape history, and paleoclimatic implications of a mid-Wisconsinan (MIS3) nonglacial sequence from southwest British Columbia, Canada |
title_fullStr |
Olympia Interstadial: vegetation, landscape history, and paleoclimatic implications of a mid-Wisconsinan (MIS3) nonglacial sequence from southwest British Columbia, Canada |
title_full_unstemmed |
Olympia Interstadial: vegetation, landscape history, and paleoclimatic implications of a mid-Wisconsinan (MIS3) nonglacial sequence from southwest British Columbia, Canada |
title_sort |
olympia interstadial: vegetation, landscape history, and paleoclimatic implications of a mid-wisconsinan (mis3) nonglacial sequence from southwest british columbia, canada |
publisher |
Canadian Science Publishing |
publishDate |
2016 |
url |
http://dx.doi.org/10.1139/cjes-2015-0122 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjes-2015-0122 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjes-2015-0122 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Canadian Journal of Earth Sciences volume 53, issue 3, page 304-320 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjes-2015-0122 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
53 |
container_issue |
3 |
container_start_page |
304 |
op_container_end_page |
320 |
_version_ |
1810450085685755904 |