Rates of Holocene isostatic uplift and relative sea-level lowering of the Baltic in SW Finland based on studies of isolation contacts
Southwestern Finland was covered by the Weichselian ice sheet and experienced rapid glacio-isostatic rebound after early Holocene deglaciation. The present mean overall apparent uplift rate is of the order of 4-5 mm/yr, but immediately after deglaciation the rate of crustal rebound was several times...
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Online Access: | https://hdl.handle.net/11370/069359c4-43e5-4dab-977d-ec015c34d3eb https://research.rug.nl/en/publications/069359c4-43e5-4dab-977d-ec015c34d3eb https://pure.rug.nl/ws/files/6663240/2001BoreasEronen.pdf |
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ftunigroningenpu:oai:pure.rug.nl:publications/069359c4-43e5-4dab-977d-ec015c34d3eb 2024-06-02T08:06:30+00:00 Rates of Holocene isostatic uplift and relative sea-level lowering of the Baltic in SW Finland based on studies of isolation contacts Eronen, M Gluckert, G Hatakka, L Van De Plassche, O Van Der Plicht, J Rantala, P 2001-03 application/pdf https://hdl.handle.net/11370/069359c4-43e5-4dab-977d-ec015c34d3eb https://research.rug.nl/en/publications/069359c4-43e5-4dab-977d-ec015c34d3eb https://pure.rug.nl/ws/files/6663240/2001BoreasEronen.pdf eng eng https://research.rug.nl/en/publications/069359c4-43e5-4dab-977d-ec015c34d3eb info:eu-repo/semantics/openAccess Eronen , M , Gluckert , G , Hatakka , L , Van De Plassche , O , Van Der Plicht , J & Rantala , P 2001 , ' Rates of Holocene isostatic uplift and relative sea-level lowering of the Baltic in SW Finland based on studies of isolation contacts ' , Boreas , vol. 30 , no. 1 , pp. 17-30 . FENNOSCANDIA CALIBRATION BP article 2001 ftunigroningenpu 2024-05-07T18:13:59Z Southwestern Finland was covered by the Weichselian ice sheet and experienced rapid glacio-isostatic rebound after early Holocene deglaciation. The present mean overall apparent uplift rate is of the order of 4-5 mm/yr, but immediately after deglaciation the rate of crustal rebound was several times higher. Concurrently with land uplift, relative sea level in the Baltic basin during the past more than 8000 years was also strongly affected by the eustatic changes in sea level. There is ample evidence from earlier studies that during the early Litorina Sea stage on the southeastern coast of Finland around 7000 yr BP (7800 cal. yr BP), the rise in sea level exceeded the rate of land uplift, resulting in a short-lived transgression. Because of a higher rate of uplift, the transgression was even more short-lived or of negligible magnitude in the southwestern part of coastal Finland, but even in this latter case a slowing down in the rate of regression can still be detected. We used evidence from isolation basins to obtain a set of 71 C-14 dates, and over 30 new sea-level index points. The age-elevation data, obtained from lakes in two different areas and located between c. 64 m and 1.5 m above present sea level, display a high degree of internal consistency. This suggests that the dates are reliable, even though most of them were based on bulk sediment samples. The two relative sea-level curves confirm the established model of relatively gradually decreasing rates of relative sea-level lowering since c. 6100 yr BP (7000 cal. yr BP) and clearly indicate that the more northerly of the two study areas experienced the higher rate of glacio-isostatic recovery. In the southerly study area, changes in diatom assemblages and lithostratigraphy suggest that during the early Litorina Sea stage (8300-7600 cal. yr BP) eustatic sea-level rise exceeded land uplift for hundreds of years. Evidence for this transgression was discovered in a lake with a basin threshold at an elevation of 41 m above sea level, which is markedly higher ... Article in Journal/Newspaper Fennoscandia Ice Sheet University of Groningen research database |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
FENNOSCANDIA CALIBRATION BP |
spellingShingle |
FENNOSCANDIA CALIBRATION BP Eronen, M Gluckert, G Hatakka, L Van De Plassche, O Van Der Plicht, J Rantala, P Rates of Holocene isostatic uplift and relative sea-level lowering of the Baltic in SW Finland based on studies of isolation contacts |
topic_facet |
FENNOSCANDIA CALIBRATION BP |
description |
Southwestern Finland was covered by the Weichselian ice sheet and experienced rapid glacio-isostatic rebound after early Holocene deglaciation. The present mean overall apparent uplift rate is of the order of 4-5 mm/yr, but immediately after deglaciation the rate of crustal rebound was several times higher. Concurrently with land uplift, relative sea level in the Baltic basin during the past more than 8000 years was also strongly affected by the eustatic changes in sea level. There is ample evidence from earlier studies that during the early Litorina Sea stage on the southeastern coast of Finland around 7000 yr BP (7800 cal. yr BP), the rise in sea level exceeded the rate of land uplift, resulting in a short-lived transgression. Because of a higher rate of uplift, the transgression was even more short-lived or of negligible magnitude in the southwestern part of coastal Finland, but even in this latter case a slowing down in the rate of regression can still be detected. We used evidence from isolation basins to obtain a set of 71 C-14 dates, and over 30 new sea-level index points. The age-elevation data, obtained from lakes in two different areas and located between c. 64 m and 1.5 m above present sea level, display a high degree of internal consistency. This suggests that the dates are reliable, even though most of them were based on bulk sediment samples. The two relative sea-level curves confirm the established model of relatively gradually decreasing rates of relative sea-level lowering since c. 6100 yr BP (7000 cal. yr BP) and clearly indicate that the more northerly of the two study areas experienced the higher rate of glacio-isostatic recovery. In the southerly study area, changes in diatom assemblages and lithostratigraphy suggest that during the early Litorina Sea stage (8300-7600 cal. yr BP) eustatic sea-level rise exceeded land uplift for hundreds of years. Evidence for this transgression was discovered in a lake with a basin threshold at an elevation of 41 m above sea level, which is markedly higher ... |
format |
Article in Journal/Newspaper |
author |
Eronen, M Gluckert, G Hatakka, L Van De Plassche, O Van Der Plicht, J Rantala, P |
author_facet |
Eronen, M Gluckert, G Hatakka, L Van De Plassche, O Van Der Plicht, J Rantala, P |
author_sort |
Eronen, M |
title |
Rates of Holocene isostatic uplift and relative sea-level lowering of the Baltic in SW Finland based on studies of isolation contacts |
title_short |
Rates of Holocene isostatic uplift and relative sea-level lowering of the Baltic in SW Finland based on studies of isolation contacts |
title_full |
Rates of Holocene isostatic uplift and relative sea-level lowering of the Baltic in SW Finland based on studies of isolation contacts |
title_fullStr |
Rates of Holocene isostatic uplift and relative sea-level lowering of the Baltic in SW Finland based on studies of isolation contacts |
title_full_unstemmed |
Rates of Holocene isostatic uplift and relative sea-level lowering of the Baltic in SW Finland based on studies of isolation contacts |
title_sort |
rates of holocene isostatic uplift and relative sea-level lowering of the baltic in sw finland based on studies of isolation contacts |
publishDate |
2001 |
url |
https://hdl.handle.net/11370/069359c4-43e5-4dab-977d-ec015c34d3eb https://research.rug.nl/en/publications/069359c4-43e5-4dab-977d-ec015c34d3eb https://pure.rug.nl/ws/files/6663240/2001BoreasEronen.pdf |
genre |
Fennoscandia Ice Sheet |
genre_facet |
Fennoscandia Ice Sheet |
op_source |
Eronen , M , Gluckert , G , Hatakka , L , Van De Plassche , O , Van Der Plicht , J & Rantala , P 2001 , ' Rates of Holocene isostatic uplift and relative sea-level lowering of the Baltic in SW Finland based on studies of isolation contacts ' , Boreas , vol. 30 , no. 1 , pp. 17-30 . |
op_relation |
https://research.rug.nl/en/publications/069359c4-43e5-4dab-977d-ec015c34d3eb |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1800751460037689344 |