The glacial geology of northeastern Ellesmere Island, N.W.T., Canada
Thirty-five radiocarbon dates associated with former ice sheet margins and raised marine deposits are presented from northeastern Ellesmere Island. Along the southern margin of Hazen Plateau, and in inner Archer Fiord, a prominent morpho-stratigraphic boundary is marked by the Hazen Moraines. These...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1978
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e78-065 http://www.nrcresearchpress.com/doi/pdf/10.1139/e78-065 |
id |
crcansciencepubl:10.1139/e78-065 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e78-065 2024-09-15T18:04:46+00:00 The glacial geology of northeastern Ellesmere Island, N.W.T., Canada England, John 1978 http://dx.doi.org/10.1139/e78-065 http://www.nrcresearchpress.com/doi/pdf/10.1139/e78-065 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 15, issue 4, page 603-617 ISSN 0008-4077 1480-3313 journal-article 1978 crcansciencepubl https://doi.org/10.1139/e78-065 2024-07-25T04:10:07Z Thirty-five radiocarbon dates associated with former ice sheet margins and raised marine deposits are presented from northeastern Ellesmere Island. Along the southern margin of Hazen Plateau, and in inner Archer Fiord, a prominent morpho-stratigraphic boundary is marked by the Hazen Moraines. These moraines represent a restricted ice advance during the last glaciation and date ca. 8130 ± 200 BP. On the immediate distal side of the Hazen Moraines, eastward for 100 km towards northwestern Greenland, the majority of dates on marine limits show synchronous emergence beginning ca. 7500 BP. This zone of synchronous emergence is considered to represent an ice-free corridor isostatically unloaded between the margins of the receding Greenland and Ellesmere island ice sheets.A more widespread till, above and beyond the Hazen Moraines, extends out of Archer Fiord–Lady Franklin Bay to Robeson and Kennedy channels. This maximum ice advance is considered to predate the last glaciation on the basis of 14 C and amino acid dates from ice-marginal deposits; however, alternative interpretations of the data are presented. Previous evidence suggesting an older advance of the Greenland Ice Sheet onto this coastline is confirmed. Several glaciers in the area are presently at their maximum postglacial positions. Article in Journal/Newspaper Ellesmere Island Franklin Bay glacier* Greenland Ice Sheet Lady Franklin Bay Canadian Science Publishing Canadian Journal of Earth Sciences 15 4 603 617 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Thirty-five radiocarbon dates associated with former ice sheet margins and raised marine deposits are presented from northeastern Ellesmere Island. Along the southern margin of Hazen Plateau, and in inner Archer Fiord, a prominent morpho-stratigraphic boundary is marked by the Hazen Moraines. These moraines represent a restricted ice advance during the last glaciation and date ca. 8130 ± 200 BP. On the immediate distal side of the Hazen Moraines, eastward for 100 km towards northwestern Greenland, the majority of dates on marine limits show synchronous emergence beginning ca. 7500 BP. This zone of synchronous emergence is considered to represent an ice-free corridor isostatically unloaded between the margins of the receding Greenland and Ellesmere island ice sheets.A more widespread till, above and beyond the Hazen Moraines, extends out of Archer Fiord–Lady Franklin Bay to Robeson and Kennedy channels. This maximum ice advance is considered to predate the last glaciation on the basis of 14 C and amino acid dates from ice-marginal deposits; however, alternative interpretations of the data are presented. Previous evidence suggesting an older advance of the Greenland Ice Sheet onto this coastline is confirmed. Several glaciers in the area are presently at their maximum postglacial positions. |
format |
Article in Journal/Newspaper |
author |
England, John |
spellingShingle |
England, John The glacial geology of northeastern Ellesmere Island, N.W.T., Canada |
author_facet |
England, John |
author_sort |
England, John |
title |
The glacial geology of northeastern Ellesmere Island, N.W.T., Canada |
title_short |
The glacial geology of northeastern Ellesmere Island, N.W.T., Canada |
title_full |
The glacial geology of northeastern Ellesmere Island, N.W.T., Canada |
title_fullStr |
The glacial geology of northeastern Ellesmere Island, N.W.T., Canada |
title_full_unstemmed |
The glacial geology of northeastern Ellesmere Island, N.W.T., Canada |
title_sort |
glacial geology of northeastern ellesmere island, n.w.t., canada |
publisher |
Canadian Science Publishing |
publishDate |
1978 |
url |
http://dx.doi.org/10.1139/e78-065 http://www.nrcresearchpress.com/doi/pdf/10.1139/e78-065 |
genre |
Ellesmere Island Franklin Bay glacier* Greenland Ice Sheet Lady Franklin Bay |
genre_facet |
Ellesmere Island Franklin Bay glacier* Greenland Ice Sheet Lady Franklin Bay |
op_source |
Canadian Journal of Earth Sciences volume 15, issue 4, page 603-617 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e78-065 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
15 |
container_issue |
4 |
container_start_page |
603 |
op_container_end_page |
617 |
_version_ |
1810442372495966208 |