Sédimentation sur la Ride de Terre-Neuve
The stratification, in part more or less rhythmic, of a fifteen metre long core of predominantly hemi-pelagic sediment from the northern slope of the Southeast Newfoundland Ridge reflects changing distribution patterns of different water masses during the late Quaternary. In particular, the litholog...
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Canadian Science Publishing
1975
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Online Access: | http://dx.doi.org/10.1139/e75-093 http://www.nrcresearchpress.com/doi/pdf/10.1139/e75-093 |
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crcansciencepubl:10.1139/e75-093 2024-09-15T18:20:10+00:00 Sédimentation sur la Ride de Terre-Neuve Pastouret, L. Auffret, G. A. Hoffert, M. Melguen, M. Needham, H. D. Latouche, C. 1975 http://dx.doi.org/10.1139/e75-093 http://www.nrcresearchpress.com/doi/pdf/10.1139/e75-093 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 12, issue 6, page 1019-1035 ISSN 0008-4077 1480-3313 journal-article 1975 crcansciencepubl https://doi.org/10.1139/e75-093 2024-07-25T04:10:05Z The stratification, in part more or less rhythmic, of a fifteen metre long core of predominantly hemi-pelagic sediment from the northern slope of the Southeast Newfoundland Ridge reflects changing distribution patterns of different water masses during the late Quaternary. In particular, the lithological and microfaunal characteristics of the sediments indicate that, in the area of the core, the cold Labrador Current from the north and the continental slope water have had a permanent influence on the sedimentation pattern, whereas the paths of the Gulf Stream water have shifted intermittently. The influence of the Gulf Stream is clearly identifiable during the Holocene and during the last interglacial (faunal zone X). Ice-rafted debris and relatively coarse turbidite-type beds are more prominent in sequences deposited under a glacial régime, notably in those that accumulated near the end of the late Pleistocene and the beginning of the Holocene. The upper limit of faunal zone X (Sangamon-Würm) is placed close to 1000 cm depth in the core on the basis of the disappearance at this level of Globorotalia tumida flexuosa (Koch). The resulting estimate of the subsequent mean sediment accumulation rate is of the order of 10 cm/1000 y. Article in Journal/Newspaper Newfoundland Terre-Neuve Canadian Science Publishing Canadian Journal of Earth Sciences 12 6 1019 1035 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
The stratification, in part more or less rhythmic, of a fifteen metre long core of predominantly hemi-pelagic sediment from the northern slope of the Southeast Newfoundland Ridge reflects changing distribution patterns of different water masses during the late Quaternary. In particular, the lithological and microfaunal characteristics of the sediments indicate that, in the area of the core, the cold Labrador Current from the north and the continental slope water have had a permanent influence on the sedimentation pattern, whereas the paths of the Gulf Stream water have shifted intermittently. The influence of the Gulf Stream is clearly identifiable during the Holocene and during the last interglacial (faunal zone X). Ice-rafted debris and relatively coarse turbidite-type beds are more prominent in sequences deposited under a glacial régime, notably in those that accumulated near the end of the late Pleistocene and the beginning of the Holocene. The upper limit of faunal zone X (Sangamon-Würm) is placed close to 1000 cm depth in the core on the basis of the disappearance at this level of Globorotalia tumida flexuosa (Koch). The resulting estimate of the subsequent mean sediment accumulation rate is of the order of 10 cm/1000 y. |
format |
Article in Journal/Newspaper |
author |
Pastouret, L. Auffret, G. A. Hoffert, M. Melguen, M. Needham, H. D. Latouche, C. |
spellingShingle |
Pastouret, L. Auffret, G. A. Hoffert, M. Melguen, M. Needham, H. D. Latouche, C. Sédimentation sur la Ride de Terre-Neuve |
author_facet |
Pastouret, L. Auffret, G. A. Hoffert, M. Melguen, M. Needham, H. D. Latouche, C. |
author_sort |
Pastouret, L. |
title |
Sédimentation sur la Ride de Terre-Neuve |
title_short |
Sédimentation sur la Ride de Terre-Neuve |
title_full |
Sédimentation sur la Ride de Terre-Neuve |
title_fullStr |
Sédimentation sur la Ride de Terre-Neuve |
title_full_unstemmed |
Sédimentation sur la Ride de Terre-Neuve |
title_sort |
sédimentation sur la ride de terre-neuve |
publisher |
Canadian Science Publishing |
publishDate |
1975 |
url |
http://dx.doi.org/10.1139/e75-093 http://www.nrcresearchpress.com/doi/pdf/10.1139/e75-093 |
genre |
Newfoundland Terre-Neuve |
genre_facet |
Newfoundland Terre-Neuve |
op_source |
Canadian Journal of Earth Sciences volume 12, issue 6, page 1019-1035 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e75-093 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
12 |
container_issue |
6 |
container_start_page |
1019 |
op_container_end_page |
1035 |
_version_ |
1810458531333144576 |