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‐isostati c 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 time...
Published in: | Boreas |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2001
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1502-3885.2001.tb00985.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2001.tb00985.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2001.tb00985.x |
id |
crwiley:10.1111/j.1502-3885.2001.tb00985.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1502-3885.2001.tb00985.x 2024-06-02T08:08:21+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, MATTI GLUCKERT, GUNNAR HATAKKA, LASSI PLASSCHE, ORSON VAN DE PLICHT, JOHANNES VAN DER RANTALA, PASI 2001 http://dx.doi.org/10.1111/j.1502-3885.2001.tb00985.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2001.tb00985.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2001.tb00985.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 30, issue 1, page 17-30 ISSN 0300-9483 1502-3885 journal-article 2001 crwiley https://doi.org/10.1111/j.1502-3885.2001.tb00985.x 2024-05-03T11:21:17Z Southwestern Finland was covered by the Weichselian ice sheet and experienced rapid glacio‐isostati c 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 14 C 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‐isostati c 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 transgressio n was discovered in a lake with a basin threshold at an elevation of 41 m above sea level, which is markedly ... Article in Journal/Newspaper Ice Sheet Wiley Online Library Boreas 30 1 17 30 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Southwestern Finland was covered by the Weichselian ice sheet and experienced rapid glacio‐isostati c 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 14 C 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‐isostati c 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 transgressio n was discovered in a lake with a basin threshold at an elevation of 41 m above sea level, which is markedly ... |
format |
Article in Journal/Newspaper |
author |
ERONEN, MATTI GLUCKERT, GUNNAR HATAKKA, LASSI PLASSCHE, ORSON VAN DE PLICHT, JOHANNES VAN DER RANTALA, PASI |
spellingShingle |
ERONEN, MATTI GLUCKERT, GUNNAR HATAKKA, LASSI PLASSCHE, ORSON VAN DE PLICHT, JOHANNES VAN DER RANTALA, PASI Rates of Holocene isostatic uplift and relative sea‐level lowering of the Baltic in SW Finland based on studies of isolation contacts |
author_facet |
ERONEN, MATTI GLUCKERT, GUNNAR HATAKKA, LASSI PLASSCHE, ORSON VAN DE PLICHT, JOHANNES VAN DER RANTALA, PASI |
author_sort |
ERONEN, MATTI |
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 |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.1111/j.1502-3885.2001.tb00985.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2001.tb00985.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2001.tb00985.x |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Boreas volume 30, issue 1, page 17-30 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.2001.tb00985.x |
container_title |
Boreas |
container_volume |
30 |
container_issue |
1 |
container_start_page |
17 |
op_container_end_page |
30 |
_version_ |
1800753573459394560 |