Holocene Environmental Change in the Frobisher Bay Area, Baffin Island, N.W.T.: Deglaciation, Emergence, and the Sequence of Vegetation and Climate
The late-glacial and Holocene paleoenvironmental sequence for the Frobisher Bay area is outlined using glacial, sea level, and palynological evidence. A rapid retreat of ice from the late Foxe glacial maximum in the lower part of the bay after 11,000 BP was followed by a series of stillstands or min...
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Les Presses de l'Université de Montréal
1985
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Online Access: | http://id.erudit.org/iderudit/032599ar https://doi.org/10.7202/032599ar |
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fterudit:oai:erudit.org:032599ar 2023-05-15T13:21:25+02:00 Holocene Environmental Change in the Frobisher Bay Area, Baffin Island, N.W.T.: Deglaciation, Emergence, and the Sequence of Vegetation and Climate Jacobs, J. D. Mode, W. N. Squires, C. A. Miller, G. H. 1985 http://id.erudit.org/iderudit/032599ar https://doi.org/10.7202/032599ar en eng Les Presses de l'Université de Montréal Érudit Géographie physique et Quaternaire vol. 39 no. 2 (1985) http://id.erudit.org/iderudit/032599ar doi:10.7202/032599ar Tous droits réservés © Les Presses de l'Université de Montréal, 1985 text 1985 fterudit https://doi.org/10.7202/032599ar 2022-09-24T23:13:38Z The late-glacial and Holocene paleoenvironmental sequence for the Frobisher Bay area is outlined using glacial, sea level, and palynological evidence. A rapid retreat of ice from the late Foxe glacial maximum in the lower part of the bay after 11,000 BP was followed by a series of stillstands or minor readvances between ca. 8500 and 7000 BP and possibly later, before the final disappearance of the inland ice centred near Amadjuak Lake. Lithostratigraphy of three buried organic sections which together represent deposition occurring over the period from 5500 to 400 BP indicates a change from a relatively warm, moist environment before 5500 BP to neoglacial conditions, with the coldest phases centred around 5000, 2700, 1200 BP and probably sometime after 400 radiocarbon years BP. As evidenced by peat growth and pollen data, milder, wetter conditions prevailed from 4500 to 3000 BP and again from ca. 2600 to 1800 BP. Peat growth and soil organic fractions point to lesser mild intervals ca. 900 BP and 400 BP, but these are not apparent in the pollen assemblage. The pollen record does not extend to the last four centuries; however, lichenometric studies of neoglacial moraines by DOWDESWELL (1984) show that the maximum late Holocene advance of glaciers in the area occurred within the last century. Modern pollen samples indicate that the present vegetation of the inner Frobisher Bay area is comparable to that of the milder intervals of the late Holocene. La présente étude porte sur l'évolution paléoenvironnementale fini-glaciaire et holocène de la région de la baie de Frobisher et se fonde sur les niveaux marins ainsi que sur des témoins polliniques et glaciaires. Le retrait rapide des glaciers dans la partie intérieure de la baie depuis 11 000 BP a été suivi d'épisodes de stabilité et de récurrences mineures entre 8500 et 7000 ans BP. et peut-être plus tard, avant la disparition définitive des glaces continentales dont le centre se trouvait près du lac Amadjuak. L'analyse a porté sur trois sections de sol enfoui qui ... Text Amadjuak Lake Baffin Island Baffin Frobisher Bay Érudit.org (Université Montréal) Amadjuak ENVELOPE(-72.648,-72.648,64.017,64.017) Amadjuak Lake ENVELOPE(-71.133,-71.133,64.917,64.917) Baffin Island Frobisher Bay ENVELOPE(-66.581,-66.581,62.834,62.834) Géographie physique et Quaternaire 39 2 151 162 |
institution |
Open Polar |
collection |
Érudit.org (Université Montréal) |
op_collection_id |
fterudit |
language |
English |
description |
The late-glacial and Holocene paleoenvironmental sequence for the Frobisher Bay area is outlined using glacial, sea level, and palynological evidence. A rapid retreat of ice from the late Foxe glacial maximum in the lower part of the bay after 11,000 BP was followed by a series of stillstands or minor readvances between ca. 8500 and 7000 BP and possibly later, before the final disappearance of the inland ice centred near Amadjuak Lake. Lithostratigraphy of three buried organic sections which together represent deposition occurring over the period from 5500 to 400 BP indicates a change from a relatively warm, moist environment before 5500 BP to neoglacial conditions, with the coldest phases centred around 5000, 2700, 1200 BP and probably sometime after 400 radiocarbon years BP. As evidenced by peat growth and pollen data, milder, wetter conditions prevailed from 4500 to 3000 BP and again from ca. 2600 to 1800 BP. Peat growth and soil organic fractions point to lesser mild intervals ca. 900 BP and 400 BP, but these are not apparent in the pollen assemblage. The pollen record does not extend to the last four centuries; however, lichenometric studies of neoglacial moraines by DOWDESWELL (1984) show that the maximum late Holocene advance of glaciers in the area occurred within the last century. Modern pollen samples indicate that the present vegetation of the inner Frobisher Bay area is comparable to that of the milder intervals of the late Holocene. La présente étude porte sur l'évolution paléoenvironnementale fini-glaciaire et holocène de la région de la baie de Frobisher et se fonde sur les niveaux marins ainsi que sur des témoins polliniques et glaciaires. Le retrait rapide des glaciers dans la partie intérieure de la baie depuis 11 000 BP a été suivi d'épisodes de stabilité et de récurrences mineures entre 8500 et 7000 ans BP. et peut-être plus tard, avant la disparition définitive des glaces continentales dont le centre se trouvait près du lac Amadjuak. L'analyse a porté sur trois sections de sol enfoui qui ... |
format |
Text |
author |
Jacobs, J. D. Mode, W. N. Squires, C. A. Miller, G. H. |
spellingShingle |
Jacobs, J. D. Mode, W. N. Squires, C. A. Miller, G. H. Holocene Environmental Change in the Frobisher Bay Area, Baffin Island, N.W.T.: Deglaciation, Emergence, and the Sequence of Vegetation and Climate |
author_facet |
Jacobs, J. D. Mode, W. N. Squires, C. A. Miller, G. H. |
author_sort |
Jacobs, J. D. |
title |
Holocene Environmental Change in the Frobisher Bay Area, Baffin Island, N.W.T.: Deglaciation, Emergence, and the Sequence of Vegetation and Climate |
title_short |
Holocene Environmental Change in the Frobisher Bay Area, Baffin Island, N.W.T.: Deglaciation, Emergence, and the Sequence of Vegetation and Climate |
title_full |
Holocene Environmental Change in the Frobisher Bay Area, Baffin Island, N.W.T.: Deglaciation, Emergence, and the Sequence of Vegetation and Climate |
title_fullStr |
Holocene Environmental Change in the Frobisher Bay Area, Baffin Island, N.W.T.: Deglaciation, Emergence, and the Sequence of Vegetation and Climate |
title_full_unstemmed |
Holocene Environmental Change in the Frobisher Bay Area, Baffin Island, N.W.T.: Deglaciation, Emergence, and the Sequence of Vegetation and Climate |
title_sort |
holocene environmental change in the frobisher bay area, baffin island, n.w.t.: deglaciation, emergence, and the sequence of vegetation and climate |
publisher |
Les Presses de l'Université de Montréal |
publishDate |
1985 |
url |
http://id.erudit.org/iderudit/032599ar https://doi.org/10.7202/032599ar |
long_lat |
ENVELOPE(-72.648,-72.648,64.017,64.017) ENVELOPE(-71.133,-71.133,64.917,64.917) ENVELOPE(-66.581,-66.581,62.834,62.834) |
geographic |
Amadjuak Amadjuak Lake Baffin Island Frobisher Bay |
geographic_facet |
Amadjuak Amadjuak Lake Baffin Island Frobisher Bay |
genre |
Amadjuak Lake Baffin Island Baffin Frobisher Bay |
genre_facet |
Amadjuak Lake Baffin Island Baffin Frobisher Bay |
op_relation |
Géographie physique et Quaternaire vol. 39 no. 2 (1985) http://id.erudit.org/iderudit/032599ar doi:10.7202/032599ar |
op_rights |
Tous droits réservés © Les Presses de l'Université de Montréal, 1985 |
op_doi |
https://doi.org/10.7202/032599ar |
container_title |
Géographie physique et Quaternaire |
container_volume |
39 |
container_issue |
2 |
container_start_page |
151 |
op_container_end_page |
162 |
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1766359203214000128 |