Ice-free intervals continuing into Marine Isotope Stage 3 at Sokli in the central area of the Fennoscandian glaciations
An unusually long and continuous Late Quaternary sedimentary sequence has been preserved in a sedimentary basin formed in the Sokli Carbonatite Massif in eastern-central Finnish Lapland. A nearly complete sediment recovery from the central Sokli basin combined with palynological results from sedimen...
Published in: | Bulletin of the Geological Society of Finland |
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Language: | English |
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Geological Society of Finland
2007
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Online Access: | https://doi.org/10.17741/bgsf/79.1.002 https://doaj.org/article/f404f36c92b941819fda0506fddf2439 |
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ftdoajarticles:oai:doaj.org/article:f404f36c92b941819fda0506fddf2439 2023-05-15T16:13:03+02:00 Ice-free intervals continuing into Marine Isotope Stage 3 at Sokli in the central area of the Fennoscandian glaciations K.F. Helmens P.W. Johansson M.E. Räsänen H. Alexanderson K.O. Eskola 2007-06-01T00:00:00Z https://doi.org/10.17741/bgsf/79.1.002 https://doaj.org/article/f404f36c92b941819fda0506fddf2439 EN eng Geological Society of Finland http://www.geologinenseura.fi/bulletin/Volume79/Helmens_etal_2007.pdf https://doaj.org/toc/0367-5211 https://doaj.org/toc/1799-4632 doi:10.17741/bgsf/79.1.002 0367-5211 1799-4632 https://doaj.org/article/f404f36c92b941819fda0506fddf2439 Bulletin of the Geological Society of Finland, Vol 79, Iss 1, Pp 17-39 (2007) glacial geology sediments stratigraphy pollen analysis paleobotany climate change interstadial environment interglacial environment chronology Pleistocene Sokli Lapland Province Finland Geology QE1-996.5 article 2007 ftdoajarticles https://doi.org/10.17741/bgsf/79.1.002 2022-12-31T08:12:24Z An unusually long and continuous Late Quaternary sedimentary sequence has been preserved in a sedimentary basin formed in the Sokli Carbonatite Massif in eastern-central Finnish Lapland. A nearly complete sediment recovery from the central Sokli basin combined with palynological results from sediments not earlier recovered and an independent OSL/AMS 14C chronology allow us here to define the Late Quaternary climate-stratigraphy at Sokli and describe in detail the environmental record. Three interstadial intervals of Weichselian age are distinguished that correlate with MIS 5c, 5a and part of MIS 3 in the marine oxygen-isotope record. The interstadials of MIS 5c and 3 age are here defined as the Sokli and Tulppio Interstadials, respectively. The MIS 5a interstadial is correlated with the Maaselkä/Peräpohjola Interstadials of Finnish Lapland, which previously have been tentatively assigned a MIS 5c age. Till beds in the Sokli sequence (deposited during stadials 3–1) correlate to MIS 5b, 4 and 3/2, respectively. Depositional environments and vegetational changes during the ice-free intervals at Sokli are discussed. The Sokli sedimentary sequence indicates significantly less extensive and more variable ice-cover over Finnish Lapland during the Weichselian than has been earlier suggested based on the long-distance correlation of litho- and bio-stratigraphic fragmentary evidence. Article in Journal/Newspaper Fennoscandian Lapland Directory of Open Access Journals: DOAJ Articles Maaselkä ENVELOPE(27.098,27.098,67.904,67.904) Peräpohjola ENVELOPE(25.967,25.967,66.667,66.667) Tulppio ENVELOPE(29.214,29.214,67.769,67.769) Bulletin of the Geological Society of Finland 79 1 17 39 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
glacial geology sediments stratigraphy pollen analysis paleobotany climate change interstadial environment interglacial environment chronology Pleistocene Sokli Lapland Province Finland Geology QE1-996.5 |
spellingShingle |
glacial geology sediments stratigraphy pollen analysis paleobotany climate change interstadial environment interglacial environment chronology Pleistocene Sokli Lapland Province Finland Geology QE1-996.5 K.F. Helmens P.W. Johansson M.E. Räsänen H. Alexanderson K.O. Eskola Ice-free intervals continuing into Marine Isotope Stage 3 at Sokli in the central area of the Fennoscandian glaciations |
topic_facet |
glacial geology sediments stratigraphy pollen analysis paleobotany climate change interstadial environment interglacial environment chronology Pleistocene Sokli Lapland Province Finland Geology QE1-996.5 |
description |
An unusually long and continuous Late Quaternary sedimentary sequence has been preserved in a sedimentary basin formed in the Sokli Carbonatite Massif in eastern-central Finnish Lapland. A nearly complete sediment recovery from the central Sokli basin combined with palynological results from sediments not earlier recovered and an independent OSL/AMS 14C chronology allow us here to define the Late Quaternary climate-stratigraphy at Sokli and describe in detail the environmental record. Three interstadial intervals of Weichselian age are distinguished that correlate with MIS 5c, 5a and part of MIS 3 in the marine oxygen-isotope record. The interstadials of MIS 5c and 3 age are here defined as the Sokli and Tulppio Interstadials, respectively. The MIS 5a interstadial is correlated with the Maaselkä/Peräpohjola Interstadials of Finnish Lapland, which previously have been tentatively assigned a MIS 5c age. Till beds in the Sokli sequence (deposited during stadials 3–1) correlate to MIS 5b, 4 and 3/2, respectively. Depositional environments and vegetational changes during the ice-free intervals at Sokli are discussed. The Sokli sedimentary sequence indicates significantly less extensive and more variable ice-cover over Finnish Lapland during the Weichselian than has been earlier suggested based on the long-distance correlation of litho- and bio-stratigraphic fragmentary evidence. |
format |
Article in Journal/Newspaper |
author |
K.F. Helmens P.W. Johansson M.E. Räsänen H. Alexanderson K.O. Eskola |
author_facet |
K.F. Helmens P.W. Johansson M.E. Räsänen H. Alexanderson K.O. Eskola |
author_sort |
K.F. Helmens |
title |
Ice-free intervals continuing into Marine Isotope Stage 3 at Sokli in the central area of the Fennoscandian glaciations |
title_short |
Ice-free intervals continuing into Marine Isotope Stage 3 at Sokli in the central area of the Fennoscandian glaciations |
title_full |
Ice-free intervals continuing into Marine Isotope Stage 3 at Sokli in the central area of the Fennoscandian glaciations |
title_fullStr |
Ice-free intervals continuing into Marine Isotope Stage 3 at Sokli in the central area of the Fennoscandian glaciations |
title_full_unstemmed |
Ice-free intervals continuing into Marine Isotope Stage 3 at Sokli in the central area of the Fennoscandian glaciations |
title_sort |
ice-free intervals continuing into marine isotope stage 3 at sokli in the central area of the fennoscandian glaciations |
publisher |
Geological Society of Finland |
publishDate |
2007 |
url |
https://doi.org/10.17741/bgsf/79.1.002 https://doaj.org/article/f404f36c92b941819fda0506fddf2439 |
long_lat |
ENVELOPE(27.098,27.098,67.904,67.904) ENVELOPE(25.967,25.967,66.667,66.667) ENVELOPE(29.214,29.214,67.769,67.769) |
geographic |
Maaselkä Peräpohjola Tulppio |
geographic_facet |
Maaselkä Peräpohjola Tulppio |
genre |
Fennoscandian Lapland |
genre_facet |
Fennoscandian Lapland |
op_source |
Bulletin of the Geological Society of Finland, Vol 79, Iss 1, Pp 17-39 (2007) |
op_relation |
http://www.geologinenseura.fi/bulletin/Volume79/Helmens_etal_2007.pdf https://doaj.org/toc/0367-5211 https://doaj.org/toc/1799-4632 doi:10.17741/bgsf/79.1.002 0367-5211 1799-4632 https://doaj.org/article/f404f36c92b941819fda0506fddf2439 |
op_doi |
https://doi.org/10.17741/bgsf/79.1.002 |
container_title |
Bulletin of the Geological Society of Finland |
container_volume |
79 |
container_issue |
1 |
container_start_page |
17 |
op_container_end_page |
39 |
_version_ |
1765998650876493824 |