10 Be data from meltwater channels suggest that Jameson Land, east Greenland, was ice-covered during the last glacial maximum
Abstract Along the northeast Greenland continental margin, bedrock on interfjord plateaus is highly weathered, whereas rock surfaces in fjord troughs are characterized by glacial scour. Based on the intense bedrock weathering and lack of glacial deposits from the last glaciation, interfjord plateaus...
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Online Access: | http://dx.doi.org/10.1016/j.yqres.2011.06.007 http://api.elsevier.com/content/article/PII:S0033589411000834?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589411000834?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400008061 |
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crcambridgeupr:10.1016/j.yqres.2011.06.007 2024-06-09T07:45:40+00:00 10 Be data from meltwater channels suggest that Jameson Land, east Greenland, was ice-covered during the last glacial maximum Håkansson, Lena Briner, Jason P. Aldahan, Ala Possnert, Göran 2011 http://dx.doi.org/10.1016/j.yqres.2011.06.007 http://api.elsevier.com/content/article/PII:S0033589411000834?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589411000834?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400008061 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 76, issue 3, page 452-459 ISSN 0033-5894 1096-0287 journal-article 2011 crcambridgeupr https://doi.org/10.1016/j.yqres.2011.06.007 2024-05-15T13:13:56Z Abstract Along the northeast Greenland continental margin, bedrock on interfjord plateaus is highly weathered, whereas rock surfaces in fjord troughs are characterized by glacial scour. Based on the intense bedrock weathering and lack of glacial deposits from the last glaciation, interfjord plateaus have long been thought to be ice-free throughout the last glacial maximum (LGM). In recent years there is growing evidence from shelf and fjord settings that the northeast Greenland continental margin was more extensively glaciated during the LGM than previously thought. However, little is still known from interfjord settings. We present cosmogenic 10 Be data from meltwater channels and weathered sandstone outcrops on Jameson Land, an interfjord highland north of Scoresby Sund. The mean exposure age of samples from channel beds (n = 3) constrains on the onset of deglaciation on interior Jameson Land to 18.5 ± 1.3–21.4 ± 1.9 ka (for erosion conditions of 0–10 mm/ka, respectively). This finding adds to growing evidence that the northeast Greenland continental margin was more heavily glaciated during the LGM than previously thought. Article in Journal/Newspaper East Greenland Greenland Scoresby Sund Cambridge University Press Greenland Jameson Land ENVELOPE(-23.500,-23.500,71.167,71.167) Scoresby ENVELOPE(162.750,162.750,-66.567,-66.567) Scoresby Sund ENVELOPE(-24.387,-24.387,70.476,70.476) Sund ENVELOPE(13.644,13.644,66.207,66.207) Quaternary Research 76 3 452 459 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Along the northeast Greenland continental margin, bedrock on interfjord plateaus is highly weathered, whereas rock surfaces in fjord troughs are characterized by glacial scour. Based on the intense bedrock weathering and lack of glacial deposits from the last glaciation, interfjord plateaus have long been thought to be ice-free throughout the last glacial maximum (LGM). In recent years there is growing evidence from shelf and fjord settings that the northeast Greenland continental margin was more extensively glaciated during the LGM than previously thought. However, little is still known from interfjord settings. We present cosmogenic 10 Be data from meltwater channels and weathered sandstone outcrops on Jameson Land, an interfjord highland north of Scoresby Sund. The mean exposure age of samples from channel beds (n = 3) constrains on the onset of deglaciation on interior Jameson Land to 18.5 ± 1.3–21.4 ± 1.9 ka (for erosion conditions of 0–10 mm/ka, respectively). This finding adds to growing evidence that the northeast Greenland continental margin was more heavily glaciated during the LGM than previously thought. |
format |
Article in Journal/Newspaper |
author |
Håkansson, Lena Briner, Jason P. Aldahan, Ala Possnert, Göran |
spellingShingle |
Håkansson, Lena Briner, Jason P. Aldahan, Ala Possnert, Göran 10 Be data from meltwater channels suggest that Jameson Land, east Greenland, was ice-covered during the last glacial maximum |
author_facet |
Håkansson, Lena Briner, Jason P. Aldahan, Ala Possnert, Göran |
author_sort |
Håkansson, Lena |
title |
10 Be data from meltwater channels suggest that Jameson Land, east Greenland, was ice-covered during the last glacial maximum |
title_short |
10 Be data from meltwater channels suggest that Jameson Land, east Greenland, was ice-covered during the last glacial maximum |
title_full |
10 Be data from meltwater channels suggest that Jameson Land, east Greenland, was ice-covered during the last glacial maximum |
title_fullStr |
10 Be data from meltwater channels suggest that Jameson Land, east Greenland, was ice-covered during the last glacial maximum |
title_full_unstemmed |
10 Be data from meltwater channels suggest that Jameson Land, east Greenland, was ice-covered during the last glacial maximum |
title_sort |
10 be data from meltwater channels suggest that jameson land, east greenland, was ice-covered during the last glacial maximum |
publisher |
Cambridge University Press (CUP) |
publishDate |
2011 |
url |
http://dx.doi.org/10.1016/j.yqres.2011.06.007 http://api.elsevier.com/content/article/PII:S0033589411000834?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589411000834?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400008061 |
long_lat |
ENVELOPE(-23.500,-23.500,71.167,71.167) ENVELOPE(162.750,162.750,-66.567,-66.567) ENVELOPE(-24.387,-24.387,70.476,70.476) ENVELOPE(13.644,13.644,66.207,66.207) |
geographic |
Greenland Jameson Land Scoresby Scoresby Sund Sund |
geographic_facet |
Greenland Jameson Land Scoresby Scoresby Sund Sund |
genre |
East Greenland Greenland Scoresby Sund |
genre_facet |
East Greenland Greenland Scoresby Sund |
op_source |
Quaternary Research volume 76, issue 3, page 452-459 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/j.yqres.2011.06.007 |
container_title |
Quaternary Research |
container_volume |
76 |
container_issue |
3 |
container_start_page |
452 |
op_container_end_page |
459 |
_version_ |
1801375129005981696 |