Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea
Abstract Two major meltwater events are documented in cores from the NW Labrador Sea. One occurred ca. 20,000 14 C yr B.P. in association with deposition of a major detrital carbonate unit. Both prior to and after this event, δ 18 O values of near-surface planktonic foraminifera were 4.5%, indicatin...
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Cambridge University Press (CUP)
1994
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crcambridgeupr:10.1006/qres.1994.1003 2024-06-09T07:44:54+00:00 Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea Andrews, John T. Erlenkeuser, Helmut Tedesco, Katherine Aksu, Ali E. Jull, A.J.Timothy 1994 http://dx.doi.org/10.1006/qres.1994.1003 http://api.elsevier.com/content/article/PII:S0033589484710039?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589484710039?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400036589 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 41, issue 1, page 26-34 ISSN 0033-5894 1096-0287 journal-article 1994 crcambridgeupr https://doi.org/10.1006/qres.1994.1003 2024-05-15T13:03:04Z Abstract Two major meltwater events are documented in cores from the NW Labrador Sea. One occurred ca. 20,000 14 C yr B.P. in association with deposition of a major detrital carbonate unit. Both prior to and after this event, δ 18 O values of near-surface planktonic foraminifera were 4.5%, indicating fully enriched glacial values. A younger event (ca. 14,000 14 C yr B.P.) is characterized by a dramatic change in δ 18 O from 4.5 to 2.0% and coincided with the retreat of ice from the outer SE Baffin Shelf, possibly into Hudson Strait. These meltwater events coincide with Heinrich (H) layers 1 and 2 from North Atlantic sediments. The 14,000 14 C yr B.P. meltwater event indicates that the eastern margin of the Laurentide Ice Sheet also underwent rapid retreat at approximately the same time as other ice sheet margins around the NE North Atlantic. A third major detrital carbonate event at the base of HU87-033-009, possibly correlative with Heinrich layer 3, occurred ca. 33,960 ± 675 14 C yr B.P.; however, this is older than the accepted date for H-3 of 27,000 14 C yr B.P. and may be H-4. Article in Journal/Newspaper Baffin Hudson Strait Ice Sheet Labrador Sea North Atlantic Planktonic foraminifera Cambridge University Press Hudson Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) Quaternary Research 41 1 26 34 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Two major meltwater events are documented in cores from the NW Labrador Sea. One occurred ca. 20,000 14 C yr B.P. in association with deposition of a major detrital carbonate unit. Both prior to and after this event, δ 18 O values of near-surface planktonic foraminifera were 4.5%, indicating fully enriched glacial values. A younger event (ca. 14,000 14 C yr B.P.) is characterized by a dramatic change in δ 18 O from 4.5 to 2.0% and coincided with the retreat of ice from the outer SE Baffin Shelf, possibly into Hudson Strait. These meltwater events coincide with Heinrich (H) layers 1 and 2 from North Atlantic sediments. The 14,000 14 C yr B.P. meltwater event indicates that the eastern margin of the Laurentide Ice Sheet also underwent rapid retreat at approximately the same time as other ice sheet margins around the NE North Atlantic. A third major detrital carbonate event at the base of HU87-033-009, possibly correlative with Heinrich layer 3, occurred ca. 33,960 ± 675 14 C yr B.P.; however, this is older than the accepted date for H-3 of 27,000 14 C yr B.P. and may be H-4. |
format |
Article in Journal/Newspaper |
author |
Andrews, John T. Erlenkeuser, Helmut Tedesco, Katherine Aksu, Ali E. Jull, A.J.Timothy |
spellingShingle |
Andrews, John T. Erlenkeuser, Helmut Tedesco, Katherine Aksu, Ali E. Jull, A.J.Timothy Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea |
author_facet |
Andrews, John T. Erlenkeuser, Helmut Tedesco, Katherine Aksu, Ali E. Jull, A.J.Timothy |
author_sort |
Andrews, John T. |
title |
Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea |
title_short |
Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea |
title_full |
Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea |
title_fullStr |
Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea |
title_full_unstemmed |
Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea |
title_sort |
late quaternary (stage 2 and 3) meltwater and heinrich events, northwest labrador sea |
publisher |
Cambridge University Press (CUP) |
publishDate |
1994 |
url |
http://dx.doi.org/10.1006/qres.1994.1003 http://api.elsevier.com/content/article/PII:S0033589484710039?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589484710039?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400036589 |
long_lat |
ENVELOPE(-70.000,-70.000,62.000,62.000) |
geographic |
Hudson Hudson Strait |
geographic_facet |
Hudson Hudson Strait |
genre |
Baffin Hudson Strait Ice Sheet Labrador Sea North Atlantic Planktonic foraminifera |
genre_facet |
Baffin Hudson Strait Ice Sheet Labrador Sea North Atlantic Planktonic foraminifera |
op_source |
Quaternary Research volume 41, issue 1, page 26-34 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1006/qres.1994.1003 |
container_title |
Quaternary Research |
container_volume |
41 |
container_issue |
1 |
container_start_page |
26 |
op_container_end_page |
34 |
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1801373736353398784 |