The Broughton Trough on the continental shelf of eastern Baffin Island, Northwest Territories
Bathymetric and seismic surveys of the trough across the continental shelf of Baffin Island at Broughton Island indicate that there were four stages in its development. The first involved deposition of Cretaceous and early Tertiary marine sediments before and during formation of a graben associated...
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Canadian Science Publishing
1982
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Online Access: | http://dx.doi.org/10.1139/e82-137 http://www.nrcresearchpress.com/doi/pdf/10.1139/e82-137 |
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crcansciencepubl:10.1139/e82-137 2024-09-15T17:56:59+00:00 The Broughton Trough on the continental shelf of eastern Baffin Island, Northwest Territories Gilbert, R. 1982 http://dx.doi.org/10.1139/e82-137 http://www.nrcresearchpress.com/doi/pdf/10.1139/e82-137 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 19, issue 8, page 1599-1607 ISSN 0008-4077 1480-3313 journal-article 1982 crcansciencepubl https://doi.org/10.1139/e82-137 2024-07-25T04:10:06Z Bathymetric and seismic surveys of the trough across the continental shelf of Baffin Island at Broughton Island indicate that there were four stages in its development. The first involved deposition of Cretaceous and early Tertiary marine sediments before and during formation of a graben associated with the opening of Baffin Bay. With the uplift of Baffin Island, extensive deltaic deposits at the distal end of the trough were laid down in the second stage. These deposits are thought to represent the products of a river system raised much above grade, flowing in the trough and the fiords to the southwest, and depositing in a sea with a relative level 300–400 m below present. In the third stage during Pliocene–Pleistocene glaciation, the proximal regions of the trough were eroded to more than 700 m below present sea level. Lateral moraines indicate the extension of ice to the edge of the continental shelf, although the relatively small amount of erosion in the distal region suggests that the ice may have been partially floating. Glaciomarine and marine sedimentation following glaciation is the final stage in the evolution of the trough. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Island Baffin Northwest Territories Canadian Science Publishing Canadian Journal of Earth Sciences 19 8 1599 1607 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Bathymetric and seismic surveys of the trough across the continental shelf of Baffin Island at Broughton Island indicate that there were four stages in its development. The first involved deposition of Cretaceous and early Tertiary marine sediments before and during formation of a graben associated with the opening of Baffin Bay. With the uplift of Baffin Island, extensive deltaic deposits at the distal end of the trough were laid down in the second stage. These deposits are thought to represent the products of a river system raised much above grade, flowing in the trough and the fiords to the southwest, and depositing in a sea with a relative level 300–400 m below present. In the third stage during Pliocene–Pleistocene glaciation, the proximal regions of the trough were eroded to more than 700 m below present sea level. Lateral moraines indicate the extension of ice to the edge of the continental shelf, although the relatively small amount of erosion in the distal region suggests that the ice may have been partially floating. Glaciomarine and marine sedimentation following glaciation is the final stage in the evolution of the trough. |
format |
Article in Journal/Newspaper |
author |
Gilbert, R. |
spellingShingle |
Gilbert, R. The Broughton Trough on the continental shelf of eastern Baffin Island, Northwest Territories |
author_facet |
Gilbert, R. |
author_sort |
Gilbert, R. |
title |
The Broughton Trough on the continental shelf of eastern Baffin Island, Northwest Territories |
title_short |
The Broughton Trough on the continental shelf of eastern Baffin Island, Northwest Territories |
title_full |
The Broughton Trough on the continental shelf of eastern Baffin Island, Northwest Territories |
title_fullStr |
The Broughton Trough on the continental shelf of eastern Baffin Island, Northwest Territories |
title_full_unstemmed |
The Broughton Trough on the continental shelf of eastern Baffin Island, Northwest Territories |
title_sort |
broughton trough on the continental shelf of eastern baffin island, northwest territories |
publisher |
Canadian Science Publishing |
publishDate |
1982 |
url |
http://dx.doi.org/10.1139/e82-137 http://www.nrcresearchpress.com/doi/pdf/10.1139/e82-137 |
genre |
Baffin Bay Baffin Bay Baffin Island Baffin Northwest Territories |
genre_facet |
Baffin Bay Baffin Bay Baffin Island Baffin Northwest Territories |
op_source |
Canadian Journal of Earth Sciences volume 19, issue 8, page 1599-1607 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e82-137 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
19 |
container_issue |
8 |
container_start_page |
1599 |
op_container_end_page |
1607 |
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1810433189093572608 |