The late Quaternary geomorphic and paleoclimatic history of the Cape Dyer area, easternmost Baffin Island, N.W.T.
The Cape Dyer area of easternmost Baffin Island was isolated from the Laurentide Ice Sheet by the fiords of Cumberland Peninsula. Accordingly, the glacial chronology at Cape Dyer is that of local ice only and is indicative of the local climate throughout the late Quaternary. Six drift units, represe...
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1987
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crcansciencepubl:10.1139/e87-114 2023-12-17T10:19:27+01:00 The late Quaternary geomorphic and paleoclimatic history of the Cape Dyer area, easternmost Baffin Island, N.W.T. Locke, William W. 1987 http://dx.doi.org/10.1139/e87-114 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-114 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 24, issue 6, page 1185-1198 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1987 crcansciencepubl https://doi.org/10.1139/e87-114 2023-11-19T13:38:40Z The Cape Dyer area of easternmost Baffin Island was isolated from the Laurentide Ice Sheet by the fiords of Cumberland Peninsula. Accordingly, the glacial chronology at Cape Dyer is that of local ice only and is indicative of the local climate throughout the late Quaternary. Six drift units, representing three periods of restricted glaciation and three of expanded glaciation, are present. Beyond the most distal drift is an area that has not been modified by glaciation.The expanded glaciations were dated through correlation on the bases of moraine morphology, soil development, and amino-acid racemization in marine mollusc shells incorporated in the drifts. No maximum age can be assigned to the earliest glaciation in the Cape Dyer area, but the last major glacial advance occurred about 70 000 years BP. The presence of extensive glaciofluvial features, faunal indicators of warm ocean water, and rapid soil development indicate that major glaciations of the Cape Dyer area accompanied winters warmer than at present but summers sufficiently cool to allow ice advance.The restricted ice advances were dated through correlation on the bases of moraine morphology, soil development, and lichen cover to the period between 9000 years BP and the present. They indicate ice extent similar to or less than at present throughout the past 60 000 years, in response to climatic conditions that were colder and dryer than the present until 9000 years BP, then slightly warmer than the present.Correlation with indicators of hemispheric and global climate indicates both in-phase and out-of-phase relationships. Glaciations at Cape Dyer are in phase with periods of high accumulation on Arctic ice caps, ice rafting of sediment in the Labrador Sea, and computed summer-insolation minima – winter-insolation maxima at 65°N latitude. This is as would be expected given the climatic interpretations of the drifts. Glaciation of the Cape Dyer area is out of phase with global ice volume as indicated by oxygen isotopes, suggesting the Antarctic dry ... Article in Journal/Newspaper Antarc* Antarctic Arctic Baffin Island Baffin Cape Dyer Cumberland Peninsula Ice Sheet Labrador Sea Canadian Science Publishing (via Crossref) Arctic Antarctic The Antarctic Baffin Island Dyer ENVELOPE(-81.366,-81.366,50.550,50.550) Cumberland Peninsula ENVELOPE(-64.497,-64.497,66.501,66.501) Cape Dyer ENVELOPE(-61.573,-61.573,66.592,66.592) Canadian Journal of Earth Sciences 24 6 1185 1198 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Locke, William W. The late Quaternary geomorphic and paleoclimatic history of the Cape Dyer area, easternmost Baffin Island, N.W.T. |
topic_facet |
General Earth and Planetary Sciences |
description |
The Cape Dyer area of easternmost Baffin Island was isolated from the Laurentide Ice Sheet by the fiords of Cumberland Peninsula. Accordingly, the glacial chronology at Cape Dyer is that of local ice only and is indicative of the local climate throughout the late Quaternary. Six drift units, representing three periods of restricted glaciation and three of expanded glaciation, are present. Beyond the most distal drift is an area that has not been modified by glaciation.The expanded glaciations were dated through correlation on the bases of moraine morphology, soil development, and amino-acid racemization in marine mollusc shells incorporated in the drifts. No maximum age can be assigned to the earliest glaciation in the Cape Dyer area, but the last major glacial advance occurred about 70 000 years BP. The presence of extensive glaciofluvial features, faunal indicators of warm ocean water, and rapid soil development indicate that major glaciations of the Cape Dyer area accompanied winters warmer than at present but summers sufficiently cool to allow ice advance.The restricted ice advances were dated through correlation on the bases of moraine morphology, soil development, and lichen cover to the period between 9000 years BP and the present. They indicate ice extent similar to or less than at present throughout the past 60 000 years, in response to climatic conditions that were colder and dryer than the present until 9000 years BP, then slightly warmer than the present.Correlation with indicators of hemispheric and global climate indicates both in-phase and out-of-phase relationships. Glaciations at Cape Dyer are in phase with periods of high accumulation on Arctic ice caps, ice rafting of sediment in the Labrador Sea, and computed summer-insolation minima – winter-insolation maxima at 65°N latitude. This is as would be expected given the climatic interpretations of the drifts. Glaciation of the Cape Dyer area is out of phase with global ice volume as indicated by oxygen isotopes, suggesting the Antarctic dry ... |
format |
Article in Journal/Newspaper |
author |
Locke, William W. |
author_facet |
Locke, William W. |
author_sort |
Locke, William W. |
title |
The late Quaternary geomorphic and paleoclimatic history of the Cape Dyer area, easternmost Baffin Island, N.W.T. |
title_short |
The late Quaternary geomorphic and paleoclimatic history of the Cape Dyer area, easternmost Baffin Island, N.W.T. |
title_full |
The late Quaternary geomorphic and paleoclimatic history of the Cape Dyer area, easternmost Baffin Island, N.W.T. |
title_fullStr |
The late Quaternary geomorphic and paleoclimatic history of the Cape Dyer area, easternmost Baffin Island, N.W.T. |
title_full_unstemmed |
The late Quaternary geomorphic and paleoclimatic history of the Cape Dyer area, easternmost Baffin Island, N.W.T. |
title_sort |
late quaternary geomorphic and paleoclimatic history of the cape dyer area, easternmost baffin island, n.w.t. |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/e87-114 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-114 |
long_lat |
ENVELOPE(-81.366,-81.366,50.550,50.550) ENVELOPE(-64.497,-64.497,66.501,66.501) ENVELOPE(-61.573,-61.573,66.592,66.592) |
geographic |
Arctic Antarctic The Antarctic Baffin Island Dyer Cumberland Peninsula Cape Dyer |
geographic_facet |
Arctic Antarctic The Antarctic Baffin Island Dyer Cumberland Peninsula Cape Dyer |
genre |
Antarc* Antarctic Arctic Baffin Island Baffin Cape Dyer Cumberland Peninsula Ice Sheet Labrador Sea |
genre_facet |
Antarc* Antarctic Arctic Baffin Island Baffin Cape Dyer Cumberland Peninsula Ice Sheet Labrador Sea |
op_source |
Canadian Journal of Earth Sciences volume 24, issue 6, page 1185-1198 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e87-114 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
24 |
container_issue |
6 |
container_start_page |
1185 |
op_container_end_page |
1198 |
_version_ |
1785583863778508800 |