Middle Weichselian glacial event in the central part of the Scandinavian Ice Sheet recorded in the Hitura pit, Ostrobothnia, Finland
The Hitura open pit exposes a sedimentary sequence up to 50 m thick representing Late Saalian to Holocene glacial and non‐glacial sediments. The sequence was investigated using sedimentological methods, OSL‐dating and pollen and diatom analyses to reconstruct the Middle Weichselian (MWG) glacial eve...
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crwiley:10.1111/j.1502-3885.2007.00009.x 2024-09-09T19:45:17+00:00 Middle Weichselian glacial event in the central part of the Scandinavian Ice Sheet recorded in the Hitura pit, Ostrobothnia, Finland SALONEN, VELI‐PEKKA KAAKINEN, ANU KULTTI, SEIJA MIETTINEN, ARTO ESKOLA, KARI O. LUNKKA, JUHA PEKKA 2007 http://dx.doi.org/10.1111/j.1502-3885.2007.00009.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2007.00009.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2007.00009.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 37, issue 1, page 38-54 ISSN 0300-9483 1502-3885 journal-article 2007 crwiley https://doi.org/10.1111/j.1502-3885.2007.00009.x 2024-06-20T04:26:18Z The Hitura open pit exposes a sedimentary sequence up to 50 m thick representing Late Saalian to Holocene glacial and non‐glacial sediments. The sequence was investigated using sedimentological methods, OSL‐dating and pollen and diatom analyses to reconstruct the Middle Weichselian (MWG) glacial event in the central part of the Scandinavian Ice Sheet (SIS). The results indicate that the sediment succession represents two entire glacial advance and retreat cycles. The lowermost deposits are Late Saalian esker and delta sediments overlain by sediments that correlate with the early Eemian lacustrine phase. Remnants of the Eemian soil post‐dating the lacustrine phase were also observed. The area was ice‐free during the entire Early Weichselian (EWG). The first glacial advance recorded in the sediments is related to the MWG. It started 79 kyr ago, deformed underlying sediments and deposited an immature till, including large detached sediment pods containing remains of organic material, soils and fluvial sediments representing allochthonous material from EWG ice‐free stadials and interstadials. The glacial deposits are conformably overlain by glaciolacustrine and littoral accumulations, indicating MWG deglaciation between 62 and 55 kyr ago. Based on the fabric measurements from the till unit overlying the MWG sediments, ice advance during the Late Weichselian (LWG) was initially from the west and later from a north‐northwesterly direction. The Hitura strata provide the first dating of the MWG deglaciation (55 to 62 kyr ago) from central parts of the SIS. It can be considered as a key site for studying the growth and decay of SIS during the poorly known early parts of the glaciation. Article in Journal/Newspaper Ice Sheet Wiley Online Library Boreas 37 1 38 54 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
The Hitura open pit exposes a sedimentary sequence up to 50 m thick representing Late Saalian to Holocene glacial and non‐glacial sediments. The sequence was investigated using sedimentological methods, OSL‐dating and pollen and diatom analyses to reconstruct the Middle Weichselian (MWG) glacial event in the central part of the Scandinavian Ice Sheet (SIS). The results indicate that the sediment succession represents two entire glacial advance and retreat cycles. The lowermost deposits are Late Saalian esker and delta sediments overlain by sediments that correlate with the early Eemian lacustrine phase. Remnants of the Eemian soil post‐dating the lacustrine phase were also observed. The area was ice‐free during the entire Early Weichselian (EWG). The first glacial advance recorded in the sediments is related to the MWG. It started 79 kyr ago, deformed underlying sediments and deposited an immature till, including large detached sediment pods containing remains of organic material, soils and fluvial sediments representing allochthonous material from EWG ice‐free stadials and interstadials. The glacial deposits are conformably overlain by glaciolacustrine and littoral accumulations, indicating MWG deglaciation between 62 and 55 kyr ago. Based on the fabric measurements from the till unit overlying the MWG sediments, ice advance during the Late Weichselian (LWG) was initially from the west and later from a north‐northwesterly direction. The Hitura strata provide the first dating of the MWG deglaciation (55 to 62 kyr ago) from central parts of the SIS. It can be considered as a key site for studying the growth and decay of SIS during the poorly known early parts of the glaciation. |
format |
Article in Journal/Newspaper |
author |
SALONEN, VELI‐PEKKA KAAKINEN, ANU KULTTI, SEIJA MIETTINEN, ARTO ESKOLA, KARI O. LUNKKA, JUHA PEKKA |
spellingShingle |
SALONEN, VELI‐PEKKA KAAKINEN, ANU KULTTI, SEIJA MIETTINEN, ARTO ESKOLA, KARI O. LUNKKA, JUHA PEKKA Middle Weichselian glacial event in the central part of the Scandinavian Ice Sheet recorded in the Hitura pit, Ostrobothnia, Finland |
author_facet |
SALONEN, VELI‐PEKKA KAAKINEN, ANU KULTTI, SEIJA MIETTINEN, ARTO ESKOLA, KARI O. LUNKKA, JUHA PEKKA |
author_sort |
SALONEN, VELI‐PEKKA |
title |
Middle Weichselian glacial event in the central part of the Scandinavian Ice Sheet recorded in the Hitura pit, Ostrobothnia, Finland |
title_short |
Middle Weichselian glacial event in the central part of the Scandinavian Ice Sheet recorded in the Hitura pit, Ostrobothnia, Finland |
title_full |
Middle Weichselian glacial event in the central part of the Scandinavian Ice Sheet recorded in the Hitura pit, Ostrobothnia, Finland |
title_fullStr |
Middle Weichselian glacial event in the central part of the Scandinavian Ice Sheet recorded in the Hitura pit, Ostrobothnia, Finland |
title_full_unstemmed |
Middle Weichselian glacial event in the central part of the Scandinavian Ice Sheet recorded in the Hitura pit, Ostrobothnia, Finland |
title_sort |
middle weichselian glacial event in the central part of the scandinavian ice sheet recorded in the hitura pit, ostrobothnia, finland |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1111/j.1502-3885.2007.00009.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2007.00009.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2007.00009.x |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Boreas volume 37, issue 1, page 38-54 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.2007.00009.x |
container_title |
Boreas |
container_volume |
37 |
container_issue |
1 |
container_start_page |
38 |
op_container_end_page |
54 |
_version_ |
1809914895843459072 |