The surface geometry of the Last Glacial Maximum ice sheet in the Andøya‐Skånland region, northern Norway, constrained by surface exposure dating and clay mineralogy
Blockfields, weathering boundaries and marginal moraines have been mapped along a longitudinal transect from northern Andøya to Skånland in northern Norway. The degree of rock‐surface weathering above and below glacial trimlines, clay‐mineral assemblages and surface exposure dating based on in situ...
Published in: | Boreas |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2007
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1502-3885.2007.tb01247.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2007.tb01247.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2007.tb01247.x |
id |
crwiley:10.1111/j.1502-3885.2007.tb01247.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1502-3885.2007.tb01247.x 2024-09-15T17:39:25+00:00 The surface geometry of the Last Glacial Maximum ice sheet in the Andøya‐Skånland region, northern Norway, constrained by surface exposure dating and clay mineralogy NESJE, ATLE DAHL, SVEIN OLAF LINGE, HENRIETTE BALLANTYNE, COLIN K. MCCARROLL, DANNY BROOK, EDWARD J. RAISBECK, GRANT M. YIOU, FRANCOISE 2007 http://dx.doi.org/10.1111/j.1502-3885.2007.tb01247.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2007.tb01247.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2007.tb01247.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 36, issue 3, page 227-239 ISSN 0300-9483 1502-3885 journal-article 2007 crwiley https://doi.org/10.1111/j.1502-3885.2007.tb01247.x 2024-07-25T04:24:10Z Blockfields, weathering boundaries and marginal moraines have been mapped along a longitudinal transect from northern Andøya to Skånland in northern Norway. The degree of rock‐surface weathering above and below glacial trimlines, clay‐mineral assemblages and surface exposure dating based on in situ cosmogenic 10 Be have been used to reconstruct the vertical dimensions and timing of the Last Glacial Maximum (LGM) of the Scandinavian Ice Sheet in this region. The cosmogenic exposure dates suggest that the lower blockfield boundary/trimline along the Andøya‐Skånland transect represents the upper limit of the Late Weichselian ice sheet, with an average surface gradient of c . 9.5 m/km. The surface exposure dates from Andøya pre‐date the LGM, suggesting that the LGM ice sheet did not reach mountain plateaux at northwest Andøya. The results thus support evidence from lake sediment records that the northern tip of Andøya was not covered by the Scandinavian Ice Sheet during the LGM. Article in Journal/Newspaper Andøya Ice Sheet Northern Norway Wiley Online Library Boreas 36 3 227 239 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Blockfields, weathering boundaries and marginal moraines have been mapped along a longitudinal transect from northern Andøya to Skånland in northern Norway. The degree of rock‐surface weathering above and below glacial trimlines, clay‐mineral assemblages and surface exposure dating based on in situ cosmogenic 10 Be have been used to reconstruct the vertical dimensions and timing of the Last Glacial Maximum (LGM) of the Scandinavian Ice Sheet in this region. The cosmogenic exposure dates suggest that the lower blockfield boundary/trimline along the Andøya‐Skånland transect represents the upper limit of the Late Weichselian ice sheet, with an average surface gradient of c . 9.5 m/km. The surface exposure dates from Andøya pre‐date the LGM, suggesting that the LGM ice sheet did not reach mountain plateaux at northwest Andøya. The results thus support evidence from lake sediment records that the northern tip of Andøya was not covered by the Scandinavian Ice Sheet during the LGM. |
format |
Article in Journal/Newspaper |
author |
NESJE, ATLE DAHL, SVEIN OLAF LINGE, HENRIETTE BALLANTYNE, COLIN K. MCCARROLL, DANNY BROOK, EDWARD J. RAISBECK, GRANT M. YIOU, FRANCOISE |
spellingShingle |
NESJE, ATLE DAHL, SVEIN OLAF LINGE, HENRIETTE BALLANTYNE, COLIN K. MCCARROLL, DANNY BROOK, EDWARD J. RAISBECK, GRANT M. YIOU, FRANCOISE The surface geometry of the Last Glacial Maximum ice sheet in the Andøya‐Skånland region, northern Norway, constrained by surface exposure dating and clay mineralogy |
author_facet |
NESJE, ATLE DAHL, SVEIN OLAF LINGE, HENRIETTE BALLANTYNE, COLIN K. MCCARROLL, DANNY BROOK, EDWARD J. RAISBECK, GRANT M. YIOU, FRANCOISE |
author_sort |
NESJE, ATLE |
title |
The surface geometry of the Last Glacial Maximum ice sheet in the Andøya‐Skånland region, northern Norway, constrained by surface exposure dating and clay mineralogy |
title_short |
The surface geometry of the Last Glacial Maximum ice sheet in the Andøya‐Skånland region, northern Norway, constrained by surface exposure dating and clay mineralogy |
title_full |
The surface geometry of the Last Glacial Maximum ice sheet in the Andøya‐Skånland region, northern Norway, constrained by surface exposure dating and clay mineralogy |
title_fullStr |
The surface geometry of the Last Glacial Maximum ice sheet in the Andøya‐Skånland region, northern Norway, constrained by surface exposure dating and clay mineralogy |
title_full_unstemmed |
The surface geometry of the Last Glacial Maximum ice sheet in the Andøya‐Skånland region, northern Norway, constrained by surface exposure dating and clay mineralogy |
title_sort |
surface geometry of the last glacial maximum ice sheet in the andøya‐skånland region, northern norway, constrained by surface exposure dating and clay mineralogy |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1111/j.1502-3885.2007.tb01247.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2007.tb01247.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2007.tb01247.x |
genre |
Andøya Ice Sheet Northern Norway |
genre_facet |
Andøya Ice Sheet Northern Norway |
op_source |
Boreas volume 36, issue 3, page 227-239 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.2007.tb01247.x |
container_title |
Boreas |
container_volume |
36 |
container_issue |
3 |
container_start_page |
227 |
op_container_end_page |
239 |
_version_ |
1810479762178572288 |