Late Quaternary Land Emergence in Northern Ungava, Quebec
Twenty-one C14 dates of material from Late Quaternary marine terraces are used to construct an isostatic uplift curve. The phase of rapid uplift averaged about 26 ft. per 100 years, while for the past 5,200 years uplift was just under 1 ft. per 100 years. Updoming resulted in an upward (southerly) t...
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The Arctic Institute of North America
1967
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/66344 2023-05-15T14:19:20+02:00 Late Quaternary Land Emergence in Northern Ungava, Quebec Matthews, Barry 1967-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66344 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66344/50257 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66344 ARCTIC; Vol. 20 No. 3 (1967): September: 145–220; 176-202 1923-1245 0004-0843 Human geography Traditional knowledge Subsistence info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1967 ftunivcalgaryojs 2022-03-22T21:23:12Z Twenty-one C14 dates of material from Late Quaternary marine terraces are used to construct an isostatic uplift curve. The phase of rapid uplift averaged about 26 ft. per 100 years, while for the past 5,200 years uplift was just under 1 ft. per 100 years. Updoming resulted in an upward (southerly) tilt of the "Glacier Beach" (460-ft. strandline) and "Upper Tunit Beach" (100-ft. strandline) at about 5.6 ft. per mile and 3.6 ft. per mile respectively. The C14 dates indicate that the general deglaciation of northern Ungava occurred about 7,000 to 8,000 years ago. Twelve well-formed marine terraces have been identified at the heads of the major fjords. The fauna of the "Upper and Lower Aporrhais Beaches" (40 ft. and 55 ft. strandlines) suggests that optimal marine conditions occurred about 3,900 to 5,230 radiocarbon years ago during a possible marine transgression. Hydroclimatic conditions during the formation of Aporrhais deposits in Sugluk Inlet (62°10'N.) corresponded to those at 58°15'N. Relèvement du sol au Quarternaire récent dans le nord de l'Ungava, Québec. Pour construire une courbe de relèvement isostatique, l'auteur utilise 21 datation au C14 se rapportant à des terrasses marines. Le relèvement, dans sa phase la plus rapide, atteignit en moyenne 26 pieds (7,93 m) par siècle; cependant au cours des 5,200 dernières années, il s'est situé juste au-dessous d'un pied (30 cm) par siècle. Le bombement a provoqué un pendage vers le sud de la "plage Glacier" (plage soulevée à 460 pieds—140,3 m) et de la "plage Tunit supérieure" (plage soulevée à 100 pieds—30,5 m) d'environ 5,6 pieds au mille (1 m/km) et 3,6 pieds au mille (60 cm/km) respectivement. Les radio-datations indiquent que la déglaciation générale du nord de l'Ungava se produisit il y a environ sept à huit millénaires. A la tête des grands fjords, on a identifié douze terrasses marines bien développées. La faune des "plages Aporrhais supérieure et inférieure" (plages oulevées à 40 pieds—12,20 m—et à 55 pieds—16,76 m) suggère que les conditions marines optimales se sont produites il y a environ de 3,900 à 5,230 ans, probablement au cours d'une transgression marine. Les conditions hydroclimatiques qui prévalaient lors de l'accumulation des dépôts "Aporrhais" du fjord de Sugluk (62º10'N) correspondaient à celles des dépôts situés au 58º15'N. Article in Journal/Newspaper Arctic University of Calgary Journal Hosting Sugluk Inlet ENVELOPE(-75.616,-75.616,62.251,62.251) ARCTIC 20 3 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Human geography Traditional knowledge Subsistence |
spellingShingle |
Human geography Traditional knowledge Subsistence Matthews, Barry Late Quaternary Land Emergence in Northern Ungava, Quebec |
topic_facet |
Human geography Traditional knowledge Subsistence |
description |
Twenty-one C14 dates of material from Late Quaternary marine terraces are used to construct an isostatic uplift curve. The phase of rapid uplift averaged about 26 ft. per 100 years, while for the past 5,200 years uplift was just under 1 ft. per 100 years. Updoming resulted in an upward (southerly) tilt of the "Glacier Beach" (460-ft. strandline) and "Upper Tunit Beach" (100-ft. strandline) at about 5.6 ft. per mile and 3.6 ft. per mile respectively. The C14 dates indicate that the general deglaciation of northern Ungava occurred about 7,000 to 8,000 years ago. Twelve well-formed marine terraces have been identified at the heads of the major fjords. The fauna of the "Upper and Lower Aporrhais Beaches" (40 ft. and 55 ft. strandlines) suggests that optimal marine conditions occurred about 3,900 to 5,230 radiocarbon years ago during a possible marine transgression. Hydroclimatic conditions during the formation of Aporrhais deposits in Sugluk Inlet (62°10'N.) corresponded to those at 58°15'N. Relèvement du sol au Quarternaire récent dans le nord de l'Ungava, Québec. Pour construire une courbe de relèvement isostatique, l'auteur utilise 21 datation au C14 se rapportant à des terrasses marines. Le relèvement, dans sa phase la plus rapide, atteignit en moyenne 26 pieds (7,93 m) par siècle; cependant au cours des 5,200 dernières années, il s'est situé juste au-dessous d'un pied (30 cm) par siècle. Le bombement a provoqué un pendage vers le sud de la "plage Glacier" (plage soulevée à 460 pieds—140,3 m) et de la "plage Tunit supérieure" (plage soulevée à 100 pieds—30,5 m) d'environ 5,6 pieds au mille (1 m/km) et 3,6 pieds au mille (60 cm/km) respectivement. Les radio-datations indiquent que la déglaciation générale du nord de l'Ungava se produisit il y a environ sept à huit millénaires. A la tête des grands fjords, on a identifié douze terrasses marines bien développées. La faune des "plages Aporrhais supérieure et inférieure" (plages oulevées à 40 pieds—12,20 m—et à 55 pieds—16,76 m) suggère que les conditions marines optimales se sont produites il y a environ de 3,900 à 5,230 ans, probablement au cours d'une transgression marine. Les conditions hydroclimatiques qui prévalaient lors de l'accumulation des dépôts "Aporrhais" du fjord de Sugluk (62º10'N) correspondaient à celles des dépôts situés au 58º15'N. |
format |
Article in Journal/Newspaper |
author |
Matthews, Barry |
author_facet |
Matthews, Barry |
author_sort |
Matthews, Barry |
title |
Late Quaternary Land Emergence in Northern Ungava, Quebec |
title_short |
Late Quaternary Land Emergence in Northern Ungava, Quebec |
title_full |
Late Quaternary Land Emergence in Northern Ungava, Quebec |
title_fullStr |
Late Quaternary Land Emergence in Northern Ungava, Quebec |
title_full_unstemmed |
Late Quaternary Land Emergence in Northern Ungava, Quebec |
title_sort |
late quaternary land emergence in northern ungava, quebec |
publisher |
The Arctic Institute of North America |
publishDate |
1967 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66344 |
long_lat |
ENVELOPE(-75.616,-75.616,62.251,62.251) |
geographic |
Sugluk Inlet |
geographic_facet |
Sugluk Inlet |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ARCTIC; Vol. 20 No. 3 (1967): September: 145–220; 176-202 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66344/50257 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66344 |
container_title |
ARCTIC |
container_volume |
20 |
container_issue |
3 |
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1766291045935480832 |