Deglaciation of the central Nain-Okak Bay section of Labrador. Arctic
ABSTRACT. Glacial erratics on the highest peaks of the Nain-Okak Bay section of Labrador indicate that at one time the entire area was completely glaciated. This complete ice cover is tentatively correlated with the Torngat Glaciation. A subsequent ice advance from the interior of Labrador, during w...
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| Format: | Text |
| Language: | English |
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1969
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.514.6611 http://pubs.aina.ucalgary.ca/arctic/Arctic22-4-373.pdf |
| Summary: | ABSTRACT. Glacial erratics on the highest peaks of the Nain-Okak Bay section of Labrador indicate that at one time the entire area was completely glaciated. This complete ice cover is tentatively correlated with the Torngat Glaciation. A subsequent ice advance from the interior of Labrador, during which the higher peaks were nunataks, would appear to correspond to the Koroksoak Glaciation, because distinct moraine systems at lower altitudes are apparently those of the Saglek Glaciation and its phases. Final deglaciation consisted basically of recession accompanying thinning of. the ice sheet in the interior of Lakrador with isolated masses of stagnant ice still occupying low lying areas when the eustatic rise of sea level began. RÉSUMÉ. Déglaciation de la section centrale Nain-baie bOkak, 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 entihrement recou-verte 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 diffkrentes 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. |
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