Deglaciation of the Central Nain-Okak Bay Section of Labrador
A complete glaciation of the highest peaks in this region, indicated by erratics on the top, is tenatively correlated with the Torngat glaciation, and a subsequent advance from interior Labrador, during which the highest peaks were nunataks, to the Koroksoak glaciation. The last deglaciation was bas...
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The Arctic Institute of North America
1969
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/66280 2023-05-15T14:19:20+02:00 Deglaciation of the Central Nain-Okak Bay Section of Labrador Johnson, Jr., J. Peter 1969-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66280 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66280/50193 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66280 ARCTIC; Vol. 22 No. 4 (1969): December: 365–456; 373-394 1923-1245 0004-0843 Moraines Nunataks Deglaciation Glaciation Torngat Mountains Labrador/Québec Okak Bay region Labrador Nain region info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1969 ftunivcalgaryojs 2022-03-22T21:23:12Z A complete glaciation of the highest peaks in this region, indicated by erratics on the top, is tenatively correlated with the Torngat glaciation, and a subsequent advance from interior Labrador, during which the highest peaks were nunataks, to the Koroksoak glaciation. The last deglaciation was basically a recession accompanying thinning of the interior Labrador ice sheet. In the Nain-Okak Bay region it occurred in four steps. Low lying areas were still occupied by isolated masses of stagnant ice when the eustatic sea-level rise began. The events leading to complete deglaciation are reconstructed mainly from the distribution of moraines, kame terraces and other ice contact and fluvioglacial features. In the absence of accurate C-14 dating, the chronology suggested is relative rather than absolute. Déglaciation de la section centrale Nain-baie d'Okak, au Labrador. Sur les plus hauts sommets de la section Nain-baie d'Okak du Labrador, des erratiques glaciaires indiquent qu'à un certain moment, toute la région était entièrement recouverte de glace. On relie provisoirement cette glaciation à celle de Torngat. Une réavancée subséquente, venue de l'intérieur, au cours de laquelle les plus hauts sommets ont constitué des nunataks, semblerait correspondre à la glaciation de Koroksoak, car les systèmes morainiques des niveaux inférieurs sont apparemment ceux de la glaciation de Saglek et ses différentes phases. La déglaciation finale a consisté surtout en une récession accompagnée d'un amincissement de l'inlandsis intérieur, tandis qu'au début du relèvement eustatique du niveau de la mer, des masses de glace stagnante occupaient encore les régions les plus basses. Article in Journal/Newspaper Arctic Ice Sheet Nain University of Calgary Journal Hosting Nain ENVELOPE(-61.695,-61.695,56.542,56.542) Okak ENVELOPE(-61.965,-61.965,57.550,57.550) Okak Bay ENVELOPE(-62.331,-62.331,57.467,57.467) Torngat Mountains ENVELOPE(-63.665,-63.665,59.000,59.000) ARCTIC 22 4 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Moraines Nunataks Deglaciation Glaciation Torngat Mountains Labrador/Québec Okak Bay region Labrador Nain region |
spellingShingle |
Moraines Nunataks Deglaciation Glaciation Torngat Mountains Labrador/Québec Okak Bay region Labrador Nain region Johnson, Jr., J. Peter Deglaciation of the Central Nain-Okak Bay Section of Labrador |
topic_facet |
Moraines Nunataks Deglaciation Glaciation Torngat Mountains Labrador/Québec Okak Bay region Labrador Nain region |
description |
A complete glaciation of the highest peaks in this region, indicated by erratics on the top, is tenatively correlated with the Torngat glaciation, and a subsequent advance from interior Labrador, during which the highest peaks were nunataks, to the Koroksoak glaciation. The last deglaciation was basically a recession accompanying thinning of the interior Labrador ice sheet. In the Nain-Okak Bay region it occurred in four steps. Low lying areas were still occupied by isolated masses of stagnant ice when the eustatic sea-level rise began. The events leading to complete deglaciation are reconstructed mainly from the distribution of moraines, kame terraces and other ice contact and fluvioglacial features. In the absence of accurate C-14 dating, the chronology suggested is relative rather than absolute. Déglaciation de la section centrale Nain-baie d'Okak, au Labrador. Sur les plus hauts sommets de la section Nain-baie d'Okak du Labrador, des erratiques glaciaires indiquent qu'à un certain moment, toute la région était entièrement recouverte de glace. On relie provisoirement cette glaciation à celle de Torngat. Une réavancée subséquente, venue de l'intérieur, au cours de laquelle les plus hauts sommets ont constitué des nunataks, semblerait correspondre à la glaciation de Koroksoak, car les systèmes morainiques des niveaux inférieurs sont apparemment ceux de la glaciation de Saglek et ses différentes phases. La déglaciation finale a consisté surtout en une récession accompagnée d'un amincissement de l'inlandsis intérieur, tandis qu'au début du relèvement eustatique du niveau de la mer, des masses de glace stagnante occupaient encore les régions les plus basses. |
format |
Article in Journal/Newspaper |
author |
Johnson, Jr., J. Peter |
author_facet |
Johnson, Jr., J. Peter |
author_sort |
Johnson, Jr., J. Peter |
title |
Deglaciation of the Central Nain-Okak Bay Section of Labrador |
title_short |
Deglaciation of the Central Nain-Okak Bay Section of Labrador |
title_full |
Deglaciation of the Central Nain-Okak Bay Section of Labrador |
title_fullStr |
Deglaciation of the Central Nain-Okak Bay Section of Labrador |
title_full_unstemmed |
Deglaciation of the Central Nain-Okak Bay Section of Labrador |
title_sort |
deglaciation of the central nain-okak bay section of labrador |
publisher |
The Arctic Institute of North America |
publishDate |
1969 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66280 |
long_lat |
ENVELOPE(-61.695,-61.695,56.542,56.542) ENVELOPE(-61.965,-61.965,57.550,57.550) ENVELOPE(-62.331,-62.331,57.467,57.467) ENVELOPE(-63.665,-63.665,59.000,59.000) |
geographic |
Nain Okak Okak Bay Torngat Mountains |
geographic_facet |
Nain Okak Okak Bay Torngat Mountains |
genre |
Arctic Ice Sheet Nain |
genre_facet |
Arctic Ice Sheet Nain |
op_source |
ARCTIC; Vol. 22 No. 4 (1969): December: 365–456; 373-394 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66280/50193 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66280 |
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ARCTIC |
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22 |
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4 |
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1766291041660436480 |