The last glaciation and sea level history of Fosheim Peninsula, Ellesmere Island, Canadian High Arctic
The last glaciation of Fosheim Peninsula is reconstructed on the basis of landform and sediment mapping and associated radiocarbon dates. Ice growth involved the expansion of cirque glaciers and accumulation on upland surfaces that are now ice free. Limited ice buildup, despite lowering of the paleo...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1996
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e96-082 http://www.nrcresearchpress.com/doi/pdf/10.1139/e96-082 |
id |
crcansciencepubl:10.1139/e96-082 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e96-082 2024-09-15T18:04:47+00:00 The last glaciation and sea level history of Fosheim Peninsula, Ellesmere Island, Canadian High Arctic Bell, Trevor 1996 http://dx.doi.org/10.1139/e96-082 http://www.nrcresearchpress.com/doi/pdf/10.1139/e96-082 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 33, issue 7, page 1075-1086 ISSN 0008-4077 1480-3313 journal-article 1996 crcansciencepubl https://doi.org/10.1139/e96-082 2024-07-25T04:10:03Z The last glaciation of Fosheim Peninsula is reconstructed on the basis of landform and sediment mapping and associated radiocarbon dates. Ice growth involved the expansion of cirque glaciers and accumulation on upland surfaces that are now ice free. Limited ice buildup, despite lowering of the paleoglaciation level by 700–800 m, is attributed to the hyperaridity of the region during glacial conditions. Marine deposits in formerly submerged basins beyond the ice margins are interpreted to represent (i) sedimentation caused by local ice buildup and marine transgression by 10.6 ka BP, (ii) increased ablation and glacier runoff [Formula: see text]9.5 ka BP, and (iii) marine regression during the Holocene. Holocene marine limit reaches a maximum elevation of approximately 150 m asl along northern Eureka Sound and Greely Fiord and descends southeastwards to 139–142 m asl near the Sawtooth Mountains. A synchronous marine limit is implied where the last ice limit was inland of the sea. The magnitude and pattern of Holocene emergence cannot be fully explained by the glacioisostatic effects of the small ice load during the last glaciation of the region. Deglaciation of the peninsula was underway by 9.5 ka BP; however, local ice caps may have persisted through the wannest period of the Holocene until 6–5 ka BP. This was likely a function of reduced sea ice conditions and increased moisture availability which benefited low-lying coastal icefields, but had negligible effect on interior highland ice caps. Article in Journal/Newspaper Ellesmere Island Eureka Sound Fosheim Peninsula Greely Fiord Sea ice Canadian Science Publishing Canadian Journal of Earth Sciences 33 7 1075 1086 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
The last glaciation of Fosheim Peninsula is reconstructed on the basis of landform and sediment mapping and associated radiocarbon dates. Ice growth involved the expansion of cirque glaciers and accumulation on upland surfaces that are now ice free. Limited ice buildup, despite lowering of the paleoglaciation level by 700–800 m, is attributed to the hyperaridity of the region during glacial conditions. Marine deposits in formerly submerged basins beyond the ice margins are interpreted to represent (i) sedimentation caused by local ice buildup and marine transgression by 10.6 ka BP, (ii) increased ablation and glacier runoff [Formula: see text]9.5 ka BP, and (iii) marine regression during the Holocene. Holocene marine limit reaches a maximum elevation of approximately 150 m asl along northern Eureka Sound and Greely Fiord and descends southeastwards to 139–142 m asl near the Sawtooth Mountains. A synchronous marine limit is implied where the last ice limit was inland of the sea. The magnitude and pattern of Holocene emergence cannot be fully explained by the glacioisostatic effects of the small ice load during the last glaciation of the region. Deglaciation of the peninsula was underway by 9.5 ka BP; however, local ice caps may have persisted through the wannest period of the Holocene until 6–5 ka BP. This was likely a function of reduced sea ice conditions and increased moisture availability which benefited low-lying coastal icefields, but had negligible effect on interior highland ice caps. |
format |
Article in Journal/Newspaper |
author |
Bell, Trevor |
spellingShingle |
Bell, Trevor The last glaciation and sea level history of Fosheim Peninsula, Ellesmere Island, Canadian High Arctic |
author_facet |
Bell, Trevor |
author_sort |
Bell, Trevor |
title |
The last glaciation and sea level history of Fosheim Peninsula, Ellesmere Island, Canadian High Arctic |
title_short |
The last glaciation and sea level history of Fosheim Peninsula, Ellesmere Island, Canadian High Arctic |
title_full |
The last glaciation and sea level history of Fosheim Peninsula, Ellesmere Island, Canadian High Arctic |
title_fullStr |
The last glaciation and sea level history of Fosheim Peninsula, Ellesmere Island, Canadian High Arctic |
title_full_unstemmed |
The last glaciation and sea level history of Fosheim Peninsula, Ellesmere Island, Canadian High Arctic |
title_sort |
last glaciation and sea level history of fosheim peninsula, ellesmere island, canadian high arctic |
publisher |
Canadian Science Publishing |
publishDate |
1996 |
url |
http://dx.doi.org/10.1139/e96-082 http://www.nrcresearchpress.com/doi/pdf/10.1139/e96-082 |
genre |
Ellesmere Island Eureka Sound Fosheim Peninsula Greely Fiord Sea ice |
genre_facet |
Ellesmere Island Eureka Sound Fosheim Peninsula Greely Fiord Sea ice |
op_source |
Canadian Journal of Earth Sciences volume 33, issue 7, page 1075-1086 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e96-082 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
33 |
container_issue |
7 |
container_start_page |
1075 |
op_container_end_page |
1086 |
_version_ |
1810442393315442688 |