Age Relationships of Laurentide and Montane Glaciations, Mackenzie Mountains, Northwest Territories
The Mackenzie Mountains were glaciated repeatedly by large valley glaciers that emanated from the Backbone Ranges, and by much smaller valley glaciers that emanated from peaks in the Canyon Ranges. During the Late Wisconsinan the Laurentide Ice Sheet reached its all-time maximum position. The ice sh...
Published in: | Géographie physique et Quaternaire |
---|---|
Main Authors: | , |
Format: | Text |
Language: | English |
Published: |
Les Presses de l'Université de Montréal
1991
|
Subjects: | |
Online Access: | http://id.erudit.org/iderudit/032847ar https://doi.org/10.7202/032847ar |
id |
fterudit:oai:erudit.org:032847ar |
---|---|
record_format |
openpolar |
spelling |
fterudit:oai:erudit.org:032847ar 2023-05-15T16:40:15+02:00 Age Relationships of Laurentide and Montane Glaciations, Mackenzie Mountains, Northwest Territories Duk-Rodkin, Alejandra Hughes, Owen L. 1991 http://id.erudit.org/iderudit/032847ar https://doi.org/10.7202/032847ar en eng Les Presses de l'Université de Montréal Érudit Géographie physique et Quaternaire vol. 45 no. 1 (1991) http://id.erudit.org/iderudit/032847ar doi:10.7202/032847ar Tous droits réservés © Les Presses de l'Université de Montréal, 1991 text 1991 fterudit https://doi.org/10.7202/032847ar 2022-09-24T23:13:43Z The Mackenzie Mountains were glaciated repeatedly by large valley glaciers that emanated from the Backbone Ranges, and by much smaller valley glaciers that emanated from peaks in the Canyon Ranges. During the Late Wisconsinan the Laurentide Ice Sheet reached its all-time maximum position. The ice sheet pressed against the Canyon Ranges and moved up major valleys causing the diversion of mountain waters and organizing a complex meltwater system that drained across mountain interfluve areas towards the northwest. Two ages of moraines deposited by montane glaciers occur widely in the Mackenzie Mountains. Near the mountain front certain of the older moraines have been truncated by the Laurentide Ice Sheet, and others have been incised by meltwater streams emanating from the Laurentide ice margin, indicating that these older moraines predate the maximum Laurentide advance. Locally, certain of the younger montane moraines breach moraines and other ice marginal features of the Laurentide maximum, indicating that the younger montane glaciation post-dated the Laurentide maximum. Some large montane glaciers extended out from the mountains to merge with the retreating Laurentide Ice Sheet. There are several localities that display the age relationships between montane and Laurentide glaciations such as Dark Rock Creek, Durkan-Lukas Valley, Little Bear River and Katherine Creek. The older of the local montane glaciations is correlated tentatively with Reid Glaciation (lllinoian?) of central Yukon, and the younger with the Late Wisconsinan McConnell Glaciation. The Laurentide Glaciation is correlated with Hungry Creek Glaciation of Bonnet Plume Depression, which probably culminated about 30,000 years ago or somewhat later. Les monts Mackenzie ont souvent été envahis par de grands glaciers de vallée, en provenance des Backbone Ranges, et par de plus petits, qui venaient des sommets des Canyon Ranges. Pendant le Wisconsinien supérieur, l'Inlandsis laurentidien atteignait ses limites maximales. Appuyé contre les Canyon ... Text Ice Sheet Mackenzie mountains Northwest Territories Yukon Érudit.org (Université Montréal) Yukon Northwest Territories Rock Creek ENVELOPE(-139.092,-139.092,64.062,64.062) Little Bear River ENVELOPE(-125.904,-125.904,64.917,64.917) Katherine Creek ENVELOPE(-127.384,-127.384,65.071,65.071) Dark Rock Creek ENVELOPE(-126.637,-126.637,63.950,63.950) Géographie physique et Quaternaire 45 1 79 90 |
institution |
Open Polar |
collection |
Érudit.org (Université Montréal) |
op_collection_id |
fterudit |
language |
English |
description |
The Mackenzie Mountains were glaciated repeatedly by large valley glaciers that emanated from the Backbone Ranges, and by much smaller valley glaciers that emanated from peaks in the Canyon Ranges. During the Late Wisconsinan the Laurentide Ice Sheet reached its all-time maximum position. The ice sheet pressed against the Canyon Ranges and moved up major valleys causing the diversion of mountain waters and organizing a complex meltwater system that drained across mountain interfluve areas towards the northwest. Two ages of moraines deposited by montane glaciers occur widely in the Mackenzie Mountains. Near the mountain front certain of the older moraines have been truncated by the Laurentide Ice Sheet, and others have been incised by meltwater streams emanating from the Laurentide ice margin, indicating that these older moraines predate the maximum Laurentide advance. Locally, certain of the younger montane moraines breach moraines and other ice marginal features of the Laurentide maximum, indicating that the younger montane glaciation post-dated the Laurentide maximum. Some large montane glaciers extended out from the mountains to merge with the retreating Laurentide Ice Sheet. There are several localities that display the age relationships between montane and Laurentide glaciations such as Dark Rock Creek, Durkan-Lukas Valley, Little Bear River and Katherine Creek. The older of the local montane glaciations is correlated tentatively with Reid Glaciation (lllinoian?) of central Yukon, and the younger with the Late Wisconsinan McConnell Glaciation. The Laurentide Glaciation is correlated with Hungry Creek Glaciation of Bonnet Plume Depression, which probably culminated about 30,000 years ago or somewhat later. Les monts Mackenzie ont souvent été envahis par de grands glaciers de vallée, en provenance des Backbone Ranges, et par de plus petits, qui venaient des sommets des Canyon Ranges. Pendant le Wisconsinien supérieur, l'Inlandsis laurentidien atteignait ses limites maximales. Appuyé contre les Canyon ... |
format |
Text |
author |
Duk-Rodkin, Alejandra Hughes, Owen L. |
spellingShingle |
Duk-Rodkin, Alejandra Hughes, Owen L. Age Relationships of Laurentide and Montane Glaciations, Mackenzie Mountains, Northwest Territories |
author_facet |
Duk-Rodkin, Alejandra Hughes, Owen L. |
author_sort |
Duk-Rodkin, Alejandra |
title |
Age Relationships of Laurentide and Montane Glaciations, Mackenzie Mountains, Northwest Territories |
title_short |
Age Relationships of Laurentide and Montane Glaciations, Mackenzie Mountains, Northwest Territories |
title_full |
Age Relationships of Laurentide and Montane Glaciations, Mackenzie Mountains, Northwest Territories |
title_fullStr |
Age Relationships of Laurentide and Montane Glaciations, Mackenzie Mountains, Northwest Territories |
title_full_unstemmed |
Age Relationships of Laurentide and Montane Glaciations, Mackenzie Mountains, Northwest Territories |
title_sort |
age relationships of laurentide and montane glaciations, mackenzie mountains, northwest territories |
publisher |
Les Presses de l'Université de Montréal |
publishDate |
1991 |
url |
http://id.erudit.org/iderudit/032847ar https://doi.org/10.7202/032847ar |
long_lat |
ENVELOPE(-139.092,-139.092,64.062,64.062) ENVELOPE(-125.904,-125.904,64.917,64.917) ENVELOPE(-127.384,-127.384,65.071,65.071) ENVELOPE(-126.637,-126.637,63.950,63.950) |
geographic |
Yukon Northwest Territories Rock Creek Little Bear River Katherine Creek Dark Rock Creek |
geographic_facet |
Yukon Northwest Territories Rock Creek Little Bear River Katherine Creek Dark Rock Creek |
genre |
Ice Sheet Mackenzie mountains Northwest Territories Yukon |
genre_facet |
Ice Sheet Mackenzie mountains Northwest Territories Yukon |
op_relation |
Géographie physique et Quaternaire vol. 45 no. 1 (1991) http://id.erudit.org/iderudit/032847ar doi:10.7202/032847ar |
op_rights |
Tous droits réservés © Les Presses de l'Université de Montréal, 1991 |
op_doi |
https://doi.org/10.7202/032847ar |
container_title |
Géographie physique et Quaternaire |
container_volume |
45 |
container_issue |
1 |
container_start_page |
79 |
op_container_end_page |
90 |
_version_ |
1766030643478659072 |