Holocene History of a Portion of Northernmost Ellesmere Island
Radiocarbon dates and glaciological features of the Ward Hunt area along northernmost Ellesmere Island suggest the following chronology, which is consistent with worldwide climatic oscillations: 1) 10,000-4100 B.P.: deglaciation, and development of several marine levels, particularly one now 40 m ab...
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The Arctic Institute of North America
1973
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/65982 2023-05-15T14:19:19+02:00 Holocene History of a Portion of Northernmost Ellesmere Island Lyons, John B. Mielke, James E. 1973-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65982 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65982/49896 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65982 ARCTIC; Vol. 26 No. 4 (1973): December: 269–348; 314-323 1923-1245 0004-0843 Long-tailed Jaegers info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1973 ftunivcalgaryojs 2022-03-22T21:22:59Z Radiocarbon dates and glaciological features of the Ward Hunt area along northernmost Ellesmere Island suggest the following chronology, which is consistent with worldwide climatic oscillations: 1) 10,000-4100 B.P.: deglaciation, and development of several marine levels, particularly one now 40 m above sea level, at 7500 ± 300 B.P.; 2) 4100-2400 years B.P.: climatic deterioration, glacial readvance and formation of ice shelves; 3) 2400-1400 years B.P.: general climatic amelioration; development of dust ablation horizon on Ward Hunt Ice Shelf, glacial retreat; 4) 1400 B.P.-present: climatic deterioration, with renewed thickening of Ward Hunt Ice Shelf, and beginnings of growth of ice rises; the last-mentioned experienced maximum growth in the interval between 350-170 years ago; slight glacial readvance. The isostatic rebound curve for northernmost Ellesmere Island differs from that of the Tanquary Fiord area 80 miles (128 km) to the south because of differing Pleistocene ice thicknesses. We estimate these to average at least 600 m for the former area and 1800 m for the latter. Article in Journal/Newspaper Arctic Ellesmere Island Ice Shelf Ice Shelves Tanquary Fiord Ward Hunt Ice Shelf University of Calgary Journal Hosting Ellesmere Island Tanquary Fiord ENVELOPE(-79.747,-79.747,81.085,81.085) Ward Hunt Ice Shelf ENVELOPE(-73.499,-73.499,83.122,83.122) ARCTIC 26 4 |
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University of Calgary Journal Hosting |
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ftunivcalgaryojs |
language |
English |
topic |
Long-tailed Jaegers |
spellingShingle |
Long-tailed Jaegers Lyons, John B. Mielke, James E. Holocene History of a Portion of Northernmost Ellesmere Island |
topic_facet |
Long-tailed Jaegers |
description |
Radiocarbon dates and glaciological features of the Ward Hunt area along northernmost Ellesmere Island suggest the following chronology, which is consistent with worldwide climatic oscillations: 1) 10,000-4100 B.P.: deglaciation, and development of several marine levels, particularly one now 40 m above sea level, at 7500 ± 300 B.P.; 2) 4100-2400 years B.P.: climatic deterioration, glacial readvance and formation of ice shelves; 3) 2400-1400 years B.P.: general climatic amelioration; development of dust ablation horizon on Ward Hunt Ice Shelf, glacial retreat; 4) 1400 B.P.-present: climatic deterioration, with renewed thickening of Ward Hunt Ice Shelf, and beginnings of growth of ice rises; the last-mentioned experienced maximum growth in the interval between 350-170 years ago; slight glacial readvance. The isostatic rebound curve for northernmost Ellesmere Island differs from that of the Tanquary Fiord area 80 miles (128 km) to the south because of differing Pleistocene ice thicknesses. We estimate these to average at least 600 m for the former area and 1800 m for the latter. |
format |
Article in Journal/Newspaper |
author |
Lyons, John B. Mielke, James E. |
author_facet |
Lyons, John B. Mielke, James E. |
author_sort |
Lyons, John B. |
title |
Holocene History of a Portion of Northernmost Ellesmere Island |
title_short |
Holocene History of a Portion of Northernmost Ellesmere Island |
title_full |
Holocene History of a Portion of Northernmost Ellesmere Island |
title_fullStr |
Holocene History of a Portion of Northernmost Ellesmere Island |
title_full_unstemmed |
Holocene History of a Portion of Northernmost Ellesmere Island |
title_sort |
holocene history of a portion of northernmost ellesmere island |
publisher |
The Arctic Institute of North America |
publishDate |
1973 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65982 |
long_lat |
ENVELOPE(-79.747,-79.747,81.085,81.085) ENVELOPE(-73.499,-73.499,83.122,83.122) |
geographic |
Ellesmere Island Tanquary Fiord Ward Hunt Ice Shelf |
geographic_facet |
Ellesmere Island Tanquary Fiord Ward Hunt Ice Shelf |
genre |
Arctic Ellesmere Island Ice Shelf Ice Shelves Tanquary Fiord Ward Hunt Ice Shelf |
genre_facet |
Arctic Ellesmere Island Ice Shelf Ice Shelves Tanquary Fiord Ward Hunt Ice Shelf |
op_source |
ARCTIC; Vol. 26 No. 4 (1973): December: 269–348; 314-323 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65982/49896 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65982 |
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ARCTIC |
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