Seabed sediments (grain size) of Nordland VI, offshore north Norway
This paper presents a seabed sediments (grain size) map of the Nordland VI area (25,000 km2) off the Lofoten islands, north Norway. The map is based on multibeam echosounder data (bathymetry and backscatter), visual analysis of 215 video transects (each 700-m long), and visual and grain-size analysi...
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ftrepec:oai:RePEc:taf:tjomxx:v:13:y:2017:i:2:p:608-620 2023-05-15T17:08:17+02:00 Seabed sediments (grain size) of Nordland VI, offshore north Norway Valérie K. Bellec Reidulv Bøe Leif Rise Aave Lepland Terje Thorsnes Lilja Rún Bjarnadóttir http://hdl.handle.net/10.1080/17445647.2017.1348307 unknown http://hdl.handle.net/10.1080/17445647.2017.1348307 article ftrepec 2020-12-04T13:41:49Z This paper presents a seabed sediments (grain size) map of the Nordland VI area (25,000 km2) off the Lofoten islands, north Norway. The map is based on multibeam echosounder data (bathymetry and backscatter), visual analysis of 215 video transects (each 700-m long), and visual and grain-size analysis of seabed sediment samples from 40 sampling stations acquired by grabs, boxcores and multicores. A total of 14 sediment classes were identified, with sediments varying in grain size from mud to boulders. Seabed types also include bedrock and bioclastic sediments from degrading cold-water coral reefs. The continental shelf is mostly characterised by coarse-grained sediments such as gravelly sand and sandy gravel, especially in till areas. In basins and glacial troughs, finer-grained sediments such as sandy mud and muddy sand dominate. The upper continental slope (300–600-m water depth) is characterised by coarse-grained sediments related to the influence of the strong north-east flowing Norwegian Atlantic Current. In deeper areas, finer-grained sediments are prominent. Below 1000-m depth, mostly mud and mud with sediment blocks occur. Article in Journal/Newspaper Lofoten Nordland Nordland North Norway Nordland RePEc (Research Papers in Economics) Lofoten Norway |
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Open Polar |
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RePEc (Research Papers in Economics) |
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description |
This paper presents a seabed sediments (grain size) map of the Nordland VI area (25,000 km2) off the Lofoten islands, north Norway. The map is based on multibeam echosounder data (bathymetry and backscatter), visual analysis of 215 video transects (each 700-m long), and visual and grain-size analysis of seabed sediment samples from 40 sampling stations acquired by grabs, boxcores and multicores. A total of 14 sediment classes were identified, with sediments varying in grain size from mud to boulders. Seabed types also include bedrock and bioclastic sediments from degrading cold-water coral reefs. The continental shelf is mostly characterised by coarse-grained sediments such as gravelly sand and sandy gravel, especially in till areas. In basins and glacial troughs, finer-grained sediments such as sandy mud and muddy sand dominate. The upper continental slope (300–600-m water depth) is characterised by coarse-grained sediments related to the influence of the strong north-east flowing Norwegian Atlantic Current. In deeper areas, finer-grained sediments are prominent. Below 1000-m depth, mostly mud and mud with sediment blocks occur. |
format |
Article in Journal/Newspaper |
author |
Valérie K. Bellec Reidulv Bøe Leif Rise Aave Lepland Terje Thorsnes Lilja Rún Bjarnadóttir |
spellingShingle |
Valérie K. Bellec Reidulv Bøe Leif Rise Aave Lepland Terje Thorsnes Lilja Rún Bjarnadóttir Seabed sediments (grain size) of Nordland VI, offshore north Norway |
author_facet |
Valérie K. Bellec Reidulv Bøe Leif Rise Aave Lepland Terje Thorsnes Lilja Rún Bjarnadóttir |
author_sort |
Valérie K. Bellec |
title |
Seabed sediments (grain size) of Nordland VI, offshore north Norway |
title_short |
Seabed sediments (grain size) of Nordland VI, offshore north Norway |
title_full |
Seabed sediments (grain size) of Nordland VI, offshore north Norway |
title_fullStr |
Seabed sediments (grain size) of Nordland VI, offshore north Norway |
title_full_unstemmed |
Seabed sediments (grain size) of Nordland VI, offshore north Norway |
title_sort |
seabed sediments (grain size) of nordland vi, offshore north norway |
url |
http://hdl.handle.net/10.1080/17445647.2017.1348307 |
geographic |
Lofoten Norway |
geographic_facet |
Lofoten Norway |
genre |
Lofoten Nordland Nordland North Norway Nordland |
genre_facet |
Lofoten Nordland Nordland North Norway Nordland |
op_relation |
http://hdl.handle.net/10.1080/17445647.2017.1348307 |
_version_ |
1766064014332264448 |