Stratigraphical signatures of glacier activity, marine processes and a possible tsunami in the Leirfjorden fjord‐valley system, north Norway
An integrated interpretation of on‐ and offshore stratigraphical records at Leirfjorden, north Norway, reveals new aspects of the area's palaeoenvironmental history. The study is based on marine sparker data and well‐exposed sections on land that were analysed for their sediment facies, mineral...
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crwiley:10.1111/bor.12311 2024-06-02T08:07:05+00:00 Stratigraphical signatures of glacier activity, marine processes and a possible tsunami in the Leirfjorden fjord‐valley system, north Norway Hansen, Louise Bøe, Reidulv Sveian, Harald Husum, Katrine Norwegian Water Resource and Energy Directorate 2018 http://dx.doi.org/10.1111/bor.12311 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fbor.12311 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12311 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 47, issue 3, page 792-812 ISSN 0300-9483 1502-3885 journal-article 2018 crwiley https://doi.org/10.1111/bor.12311 2024-05-03T11:04:34Z An integrated interpretation of on‐ and offshore stratigraphical records at Leirfjorden, north Norway, reveals new aspects of the area's palaeoenvironmental history. The study is based on marine sparker data and well‐exposed sections on land that were analysed for their sediment facies, mineralogy and fossil assemblages. Existing research and new radiocarbon dates provide a chronological framework for the interpretation. The late Younger Dryas Nordli substage type locality in the Leirfjorden catchment is revised and found to reflect local glacial activity, maybe a collapse of stagnant ice rather than glacier advance, while late Younger Dryas to Preboreal glacier re‐advances south of Leirfjorden and near Ranfjorden are here named the Bardal substage. The stratigraphical record includes pre‐Younger Dryas, valley‐crossing, glacial striae and old till with provenance of resistant bedrock typical of more elevated mountain areas. It differs from younger till units representing topographically controlled glacier movement. Part of the Leirfjorden fjord‐valley system is located between the main glacial and fluvial drainage paths affecting the sediment supply. As a result, highstand deposits are indistinct and fluvial sediments form only a minor part of the forced‐regressive systems tract. Instead, the valley fill overlying till and subtill sediments is dominated by the deglacial transgressive tract and a forced‐regressive systems tract with composite marine deposits and various marine erosion surfaces. A special event bed is interpreted as a possible tsunami deposit caused by seismicity and/or mass‐wasting in the fjord following glacier retreat. The study highlights the stratigraphical complexity of interconnected fjord and sound systems in a low accretion setting. Article in Journal/Newspaper glacier North Norway Wiley Online Library Bardal ENVELOPE(13.380,13.380,66.217,66.217) Nordli ENVELOPE(8.476,8.476,63.063,63.063) Norway Boreas 47 3 792 812 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
An integrated interpretation of on‐ and offshore stratigraphical records at Leirfjorden, north Norway, reveals new aspects of the area's palaeoenvironmental history. The study is based on marine sparker data and well‐exposed sections on land that were analysed for their sediment facies, mineralogy and fossil assemblages. Existing research and new radiocarbon dates provide a chronological framework for the interpretation. The late Younger Dryas Nordli substage type locality in the Leirfjorden catchment is revised and found to reflect local glacial activity, maybe a collapse of stagnant ice rather than glacier advance, while late Younger Dryas to Preboreal glacier re‐advances south of Leirfjorden and near Ranfjorden are here named the Bardal substage. The stratigraphical record includes pre‐Younger Dryas, valley‐crossing, glacial striae and old till with provenance of resistant bedrock typical of more elevated mountain areas. It differs from younger till units representing topographically controlled glacier movement. Part of the Leirfjorden fjord‐valley system is located between the main glacial and fluvial drainage paths affecting the sediment supply. As a result, highstand deposits are indistinct and fluvial sediments form only a minor part of the forced‐regressive systems tract. Instead, the valley fill overlying till and subtill sediments is dominated by the deglacial transgressive tract and a forced‐regressive systems tract with composite marine deposits and various marine erosion surfaces. A special event bed is interpreted as a possible tsunami deposit caused by seismicity and/or mass‐wasting in the fjord following glacier retreat. The study highlights the stratigraphical complexity of interconnected fjord and sound systems in a low accretion setting. |
author2 |
Norwegian Water Resource and Energy Directorate |
format |
Article in Journal/Newspaper |
author |
Hansen, Louise Bøe, Reidulv Sveian, Harald Husum, Katrine |
spellingShingle |
Hansen, Louise Bøe, Reidulv Sveian, Harald Husum, Katrine Stratigraphical signatures of glacier activity, marine processes and a possible tsunami in the Leirfjorden fjord‐valley system, north Norway |
author_facet |
Hansen, Louise Bøe, Reidulv Sveian, Harald Husum, Katrine |
author_sort |
Hansen, Louise |
title |
Stratigraphical signatures of glacier activity, marine processes and a possible tsunami in the Leirfjorden fjord‐valley system, north Norway |
title_short |
Stratigraphical signatures of glacier activity, marine processes and a possible tsunami in the Leirfjorden fjord‐valley system, north Norway |
title_full |
Stratigraphical signatures of glacier activity, marine processes and a possible tsunami in the Leirfjorden fjord‐valley system, north Norway |
title_fullStr |
Stratigraphical signatures of glacier activity, marine processes and a possible tsunami in the Leirfjorden fjord‐valley system, north Norway |
title_full_unstemmed |
Stratigraphical signatures of glacier activity, marine processes and a possible tsunami in the Leirfjorden fjord‐valley system, north Norway |
title_sort |
stratigraphical signatures of glacier activity, marine processes and a possible tsunami in the leirfjorden fjord‐valley system, north norway |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1111/bor.12311 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fbor.12311 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12311 |
long_lat |
ENVELOPE(13.380,13.380,66.217,66.217) ENVELOPE(8.476,8.476,63.063,63.063) |
geographic |
Bardal Nordli Norway |
geographic_facet |
Bardal Nordli Norway |
genre |
glacier North Norway |
genre_facet |
glacier North Norway |
op_source |
Boreas volume 47, issue 3, page 792-812 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/bor.12311 |
container_title |
Boreas |
container_volume |
47 |
container_issue |
3 |
container_start_page |
792 |
op_container_end_page |
812 |
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1800752106210066432 |