Glacial advances and stratigraphy in Otto Fiord and adjacent areas, Ellesmere Island, Northwest Territories
Hvitland and Svartfjeld peninsulas have been glaciated at least two or three times since the Late Pliocene. The earliest recognized glaciation is constrained by amino acid ratios on in situ pelecypods from marine sediments stratigraphically overlying till in Otto Fiord. High amino acid ratios sugges...
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crcansciencepubl:10.1139/e95-006 2024-04-07T07:52:13+00:00 Glacial advances and stratigraphy in Otto Fiord and adjacent areas, Ellesmere Island, Northwest Territories Bednarski, Jan 1995 http://dx.doi.org/10.1139/e95-006 http://www.nrcresearchpress.com/doi/pdf/10.1139/e95-006 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 32, issue 1, page 52-64 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1995 crcansciencepubl https://doi.org/10.1139/e95-006 2024-03-08T00:37:30Z Hvitland and Svartfjeld peninsulas have been glaciated at least two or three times since the Late Pliocene. The earliest recognized glaciation is constrained by amino acid ratios on in situ pelecypods from marine sediments stratigraphically overlying till in Otto Fiord. High amino acid ratios suggest that the shells may be Pliocene and related to recently discovered Late Pliocene Hvitland beds at White Point. The same samples yielded finite radiocarbon ages in the 30.2–34.8 ka BP range, which cautions against their acceptance. A second, mid Quaternary glaciation is suggested by intermediate amino acid ratios from in situ pelecypods and shell-bearing till covering coastal uplands along Nansen Sound. During the last glaciation the peninsula was covered by coalesced ice caps, with glacial tongues descending tributary valleys and extending into the fiords. Deglaciation of a tributary valley in outer Otto Fiord proceeded before 11.6 ka BP and before 9.1 ka BP in mid Otto Fiord, but major ice margins remained at the coast until 8–8.5 ka BP. Lateral meltwater channels record systematic ice retreat up tributary valleys into the interior of the peninsulas. The highest recognized marine limits are marked by prominent deltas at least 164 m asl on western Hvitland Peninsula. The marine limit declines eastward inside Otto, Jugeborg, and Hare fiords. The highest strandlines could not be dated; however, by ~8.3 ka BP relative sea level stood at 103 m asl. Article in Journal/Newspaper Ellesmere Island Nansen Sound Northwest Territories Canadian Science Publishing Northwest Territories Ellesmere Island Nansen Sound ENVELOPE(-90.584,-90.584,81.002,81.002) Otto Fiord ENVELOPE(-87.000,-87.000,81.035,81.035) White Point ENVELOPE(-56.582,-56.582,49.833,49.833) Hvitland Peninsula ENVELOPE(-88.000,-88.000,81.252,81.252) Canadian Journal of Earth Sciences 32 1 52 64 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Bednarski, Jan Glacial advances and stratigraphy in Otto Fiord and adjacent areas, Ellesmere Island, Northwest Territories |
topic_facet |
General Earth and Planetary Sciences |
description |
Hvitland and Svartfjeld peninsulas have been glaciated at least two or three times since the Late Pliocene. The earliest recognized glaciation is constrained by amino acid ratios on in situ pelecypods from marine sediments stratigraphically overlying till in Otto Fiord. High amino acid ratios suggest that the shells may be Pliocene and related to recently discovered Late Pliocene Hvitland beds at White Point. The same samples yielded finite radiocarbon ages in the 30.2–34.8 ka BP range, which cautions against their acceptance. A second, mid Quaternary glaciation is suggested by intermediate amino acid ratios from in situ pelecypods and shell-bearing till covering coastal uplands along Nansen Sound. During the last glaciation the peninsula was covered by coalesced ice caps, with glacial tongues descending tributary valleys and extending into the fiords. Deglaciation of a tributary valley in outer Otto Fiord proceeded before 11.6 ka BP and before 9.1 ka BP in mid Otto Fiord, but major ice margins remained at the coast until 8–8.5 ka BP. Lateral meltwater channels record systematic ice retreat up tributary valleys into the interior of the peninsulas. The highest recognized marine limits are marked by prominent deltas at least 164 m asl on western Hvitland Peninsula. The marine limit declines eastward inside Otto, Jugeborg, and Hare fiords. The highest strandlines could not be dated; however, by ~8.3 ka BP relative sea level stood at 103 m asl. |
format |
Article in Journal/Newspaper |
author |
Bednarski, Jan |
author_facet |
Bednarski, Jan |
author_sort |
Bednarski, Jan |
title |
Glacial advances and stratigraphy in Otto Fiord and adjacent areas, Ellesmere Island, Northwest Territories |
title_short |
Glacial advances and stratigraphy in Otto Fiord and adjacent areas, Ellesmere Island, Northwest Territories |
title_full |
Glacial advances and stratigraphy in Otto Fiord and adjacent areas, Ellesmere Island, Northwest Territories |
title_fullStr |
Glacial advances and stratigraphy in Otto Fiord and adjacent areas, Ellesmere Island, Northwest Territories |
title_full_unstemmed |
Glacial advances and stratigraphy in Otto Fiord and adjacent areas, Ellesmere Island, Northwest Territories |
title_sort |
glacial advances and stratigraphy in otto fiord and adjacent areas, ellesmere island, northwest territories |
publisher |
Canadian Science Publishing |
publishDate |
1995 |
url |
http://dx.doi.org/10.1139/e95-006 http://www.nrcresearchpress.com/doi/pdf/10.1139/e95-006 |
long_lat |
ENVELOPE(-90.584,-90.584,81.002,81.002) ENVELOPE(-87.000,-87.000,81.035,81.035) ENVELOPE(-56.582,-56.582,49.833,49.833) ENVELOPE(-88.000,-88.000,81.252,81.252) |
geographic |
Northwest Territories Ellesmere Island Nansen Sound Otto Fiord White Point Hvitland Peninsula |
geographic_facet |
Northwest Territories Ellesmere Island Nansen Sound Otto Fiord White Point Hvitland Peninsula |
genre |
Ellesmere Island Nansen Sound Northwest Territories |
genre_facet |
Ellesmere Island Nansen Sound Northwest Territories |
op_source |
Canadian Journal of Earth Sciences volume 32, issue 1, page 52-64 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e95-006 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
32 |
container_issue |
1 |
container_start_page |
52 |
op_container_end_page |
64 |
_version_ |
1795667451632943104 |