Geomorphological Investigations in the Torngat Mountains of Northeastern Labrador-Ungava
. The central area of study lay athwart the Labrador-Quebec boundary on the watershed between Nakvak Brook, which drains into Saglek Fiord, and the Koroksoak (Korok) River, which flows westwards into Ungava Bay. . Attention was concentrated on an extensive system of lateral moraines and kame terrace...
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The Arctic Institute of North America
1957
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/66818 2023-05-15T14:18:50+02:00 Geomorphological Investigations in the Torngat Mountains of Northeastern Labrador-Ungava Ives, J.D. 1957-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66818 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66818/50731 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66818 ARCTIC; Vol 10, No 4: 1957; 243-244 1923-1245 0004-0843 Deglaciation Geological time Geomorphology Glacial epoch Glacial landforms Glaciation Glacier lakes Glaciers Moraines Pleistocene epoch Torngat Mountains Labrador/Québec Nakvak Brook region Labrador Koroc Rivière region Québec info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1957 ftunivcalgaryojs 2022-03-22T21:23:36Z . The central area of study lay athwart the Labrador-Quebec boundary on the watershed between Nakvak Brook, which drains into Saglek Fiord, and the Koroksoak (Korok) River, which flows westwards into Ungava Bay. . Attention was concentrated on an extensive system of lateral moraines and kame terraces which slope eastwards from the watershed towards the head of Saglek Fiord. Similar systems were examined in the through-troughs to the south. The whole complex represents the late-Pleistocene limits of trunk glaciers flowing through the mountains towards the east and supplied by an ice cap of continental proportions west of the height of land. At this stage the higher summits stood as nunataks well above the level of the ice, and an extensive series of ice-dammed lakes was held against the western slopes of the highland finding outlets over ice-free cols into the Atlantic. Detailed studies in the watershed area provide a chronology of the final emergence of the area from the last ice sheet, and the draining of the ice-dammed lakes. A final stage was represented by a mass of ice in the lower valley of the Koroksoak which dammed a lake to the level of the col, at 1,050 feet, whence it drained into Nakvak Brook and ultimately into the Atlantic. Glacial erratics, found on summits up to 4,000 feet above sea level, corroborate the conclusions of the previous summer's work suggesting that at some stage the highest summits were inundated by ice flowing from the west. The data compiled from the two summers' work prompt the conclusion that during late-Pleistocene times the Torngat Mountains were influenced by two distinct glaciations, separated by an interglacial period of considerable intensity. The final glaciation, during which large areas remained ice-free, is tentatively correlated with the "classical" Wisconsin of central North America whereas the date of the preceding glacial period is uncertain. It may be the equivalent of the Illinoian Glaciation, or even be of post-Sangamon age, and in this case be comparable with a cold phase tentatively identified in central North America, which is older than the "classical" Wisconsin Glaciation, and is separated from the latter by a warmer period. Reconnaissance from the air during flights along the Labrador coast and some distance inland suggests that these general conclusions might well be applicable to the entire coastal zone of Labrador. . Article in Journal/Newspaper Arctic Ice cap Ice Sheet Ungava Bay University of Calgary Journal Hosting Nakvak Brook ENVELOPE(-63.313,-63.313,58.497,58.497) Saglek Fiord ENVELOPE(-63.248,-63.248,58.484,58.484) Torngat Mountains ENVELOPE(-63.665,-63.665,59.000,59.000) Ungava Bay ENVELOPE(-67.489,-67.489,59.498,59.498) ARCTIC 10 4 243 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Deglaciation Geological time Geomorphology Glacial epoch Glacial landforms Glaciation Glacier lakes Glaciers Moraines Pleistocene epoch Torngat Mountains Labrador/Québec Nakvak Brook region Labrador Koroc Rivière region Québec |
spellingShingle |
Deglaciation Geological time Geomorphology Glacial epoch Glacial landforms Glaciation Glacier lakes Glaciers Moraines Pleistocene epoch Torngat Mountains Labrador/Québec Nakvak Brook region Labrador Koroc Rivière region Québec Ives, J.D. Geomorphological Investigations in the Torngat Mountains of Northeastern Labrador-Ungava |
topic_facet |
Deglaciation Geological time Geomorphology Glacial epoch Glacial landforms Glaciation Glacier lakes Glaciers Moraines Pleistocene epoch Torngat Mountains Labrador/Québec Nakvak Brook region Labrador Koroc Rivière region Québec |
description |
. The central area of study lay athwart the Labrador-Quebec boundary on the watershed between Nakvak Brook, which drains into Saglek Fiord, and the Koroksoak (Korok) River, which flows westwards into Ungava Bay. . Attention was concentrated on an extensive system of lateral moraines and kame terraces which slope eastwards from the watershed towards the head of Saglek Fiord. Similar systems were examined in the through-troughs to the south. The whole complex represents the late-Pleistocene limits of trunk glaciers flowing through the mountains towards the east and supplied by an ice cap of continental proportions west of the height of land. At this stage the higher summits stood as nunataks well above the level of the ice, and an extensive series of ice-dammed lakes was held against the western slopes of the highland finding outlets over ice-free cols into the Atlantic. Detailed studies in the watershed area provide a chronology of the final emergence of the area from the last ice sheet, and the draining of the ice-dammed lakes. A final stage was represented by a mass of ice in the lower valley of the Koroksoak which dammed a lake to the level of the col, at 1,050 feet, whence it drained into Nakvak Brook and ultimately into the Atlantic. Glacial erratics, found on summits up to 4,000 feet above sea level, corroborate the conclusions of the previous summer's work suggesting that at some stage the highest summits were inundated by ice flowing from the west. The data compiled from the two summers' work prompt the conclusion that during late-Pleistocene times the Torngat Mountains were influenced by two distinct glaciations, separated by an interglacial period of considerable intensity. The final glaciation, during which large areas remained ice-free, is tentatively correlated with the "classical" Wisconsin of central North America whereas the date of the preceding glacial period is uncertain. It may be the equivalent of the Illinoian Glaciation, or even be of post-Sangamon age, and in this case be comparable with a cold phase tentatively identified in central North America, which is older than the "classical" Wisconsin Glaciation, and is separated from the latter by a warmer period. Reconnaissance from the air during flights along the Labrador coast and some distance inland suggests that these general conclusions might well be applicable to the entire coastal zone of Labrador. . |
format |
Article in Journal/Newspaper |
author |
Ives, J.D. |
author_facet |
Ives, J.D. |
author_sort |
Ives, J.D. |
title |
Geomorphological Investigations in the Torngat Mountains of Northeastern Labrador-Ungava |
title_short |
Geomorphological Investigations in the Torngat Mountains of Northeastern Labrador-Ungava |
title_full |
Geomorphological Investigations in the Torngat Mountains of Northeastern Labrador-Ungava |
title_fullStr |
Geomorphological Investigations in the Torngat Mountains of Northeastern Labrador-Ungava |
title_full_unstemmed |
Geomorphological Investigations in the Torngat Mountains of Northeastern Labrador-Ungava |
title_sort |
geomorphological investigations in the torngat mountains of northeastern labrador-ungava |
publisher |
The Arctic Institute of North America |
publishDate |
1957 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66818 |
long_lat |
ENVELOPE(-63.313,-63.313,58.497,58.497) ENVELOPE(-63.248,-63.248,58.484,58.484) ENVELOPE(-63.665,-63.665,59.000,59.000) ENVELOPE(-67.489,-67.489,59.498,59.498) |
geographic |
Nakvak Brook Saglek Fiord Torngat Mountains Ungava Bay |
geographic_facet |
Nakvak Brook Saglek Fiord Torngat Mountains Ungava Bay |
genre |
Arctic Ice cap Ice Sheet Ungava Bay |
genre_facet |
Arctic Ice cap Ice Sheet Ungava Bay |
op_source |
ARCTIC; Vol 10, No 4: 1957; 243-244 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66818/50731 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66818 |
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ARCTIC |
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10 |
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