Millennial-scale depositional cycles related to British Ice Sheet variability and North Atlantic paleocirculation since 45 kyr B.P., Barra Fan, U.K. margin
Lithology, lithic petrology, planktonic foraminiferal abundances, and elastic grain sizes have been determined in a 30 m-long core recovered from the Barra Fan off northwest Scotland. The record extends back to around 45 kyr B.P., with sedimentation rates ranging between 50 and 200 cm/kyr. The abund...
Published in: | Paleoceanography |
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Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2001
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/millennialscale-depositional-cycles-related-to-british-ice-sheet-variability-and-north-atlantic-paleocirculation-since-45-kyr-bp-barra-fan-uk-margin(ebb5d802-ff5f-4e48-af5f-d2a794ed761d).html https://doi.org/10.1029/1999PA000483 http://www.scopus.com/inward/record.url?scp=0035062527&partnerID=8YFLogxK |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/ebb5d802-ff5f-4e48-af5f-d2a794ed761d 2024-06-23T07:53:21+00:00 Millennial-scale depositional cycles related to British Ice Sheet variability and North Atlantic paleocirculation since 45 kyr B.P., Barra Fan, U.K. margin Knutz, PC Austin, William Edward Newns Jones, EJW 2001-02 https://research-portal.st-andrews.ac.uk/en/researchoutput/millennialscale-depositional-cycles-related-to-british-ice-sheet-variability-and-north-atlantic-paleocirculation-since-45-kyr-bp-barra-fan-uk-margin(ebb5d802-ff5f-4e48-af5f-d2a794ed761d).html https://doi.org/10.1029/1999PA000483 http://www.scopus.com/inward/record.url?scp=0035062527&partnerID=8YFLogxK eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/millennialscale-depositional-cycles-related-to-british-ice-sheet-variability-and-north-atlantic-paleocirculation-since-45-kyr-bp-barra-fan-uk-margin(ebb5d802-ff5f-4e48-af5f-d2a794ed761d).html info:eu-repo/semantics/restrictedAccess Knutz , PC , Austin , W E N & Jones , EJW 2001 , ' Millennial-scale depositional cycles related to British Ice Sheet variability and North Atlantic paleocirculation since 45 kyr B.P., Barra Fan, U.K. margin ' , Paleoceanography , vol. 16 , no. 1 , pp. 53-64 . https://doi.org/10.1029/1999PA000483 LAST GLACIAL PERIOD CONTINENTAL-SHELF WEST HEINRICH EVENTS DEEP-WATER THERMOHALINE CIRCULATION ICEBERG DISCHARGES GREENLAND SNOW NORWEGIAN-SEA RAPID CHANGES LABRADOR-SEA article 2001 ftunstandrewcris https://doi.org/10.1029/1999PA000483 2024-06-13T00:10:12Z Lithology, lithic petrology, planktonic foraminiferal abundances, and elastic grain sizes have been determined in a 30 m-long core recovered from the Barra Fan off northwest Scotland. The record extends back to around 45 kyr B.P., with sedimentation rates ranging between 50 and 200 cm/kyr. The abundance of ice-rafted debris indicates 16 glacimarine events, including temporal equivalents to Heinrich events 1-4. Enhanced concentrations of basaltic material derived from the British Tertiary Province suggest that the glacimarine sediments record variations in a glacial source on the Hebrides shelf margin. Glacimarine zones are separated by silty intervals with high planktonic foraminifera concentrations that reflect an interstadial circulation regime in the Rockall Trough. The results suggest that the last British Ice Sheet fluctuated with a periodicity of 2000-3000 years, in common with the Dansgaard-Oeschger climate cycle. Article in Journal/Newspaper Greenland Ice Sheet Labrador Sea North Atlantic Norwegian Sea Planktonic foraminifera University of St Andrews: Research Portal Barra ENVELOPE(-61.417,-61.417,-64.367,-64.367) Greenland Norwegian Sea Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825) Paleoceanography 16 1 53 64 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
LAST GLACIAL PERIOD CONTINENTAL-SHELF WEST HEINRICH EVENTS DEEP-WATER THERMOHALINE CIRCULATION ICEBERG DISCHARGES GREENLAND SNOW NORWEGIAN-SEA RAPID CHANGES LABRADOR-SEA |
spellingShingle |
LAST GLACIAL PERIOD CONTINENTAL-SHELF WEST HEINRICH EVENTS DEEP-WATER THERMOHALINE CIRCULATION ICEBERG DISCHARGES GREENLAND SNOW NORWEGIAN-SEA RAPID CHANGES LABRADOR-SEA Knutz, PC Austin, William Edward Newns Jones, EJW Millennial-scale depositional cycles related to British Ice Sheet variability and North Atlantic paleocirculation since 45 kyr B.P., Barra Fan, U.K. margin |
topic_facet |
LAST GLACIAL PERIOD CONTINENTAL-SHELF WEST HEINRICH EVENTS DEEP-WATER THERMOHALINE CIRCULATION ICEBERG DISCHARGES GREENLAND SNOW NORWEGIAN-SEA RAPID CHANGES LABRADOR-SEA |
description |
Lithology, lithic petrology, planktonic foraminiferal abundances, and elastic grain sizes have been determined in a 30 m-long core recovered from the Barra Fan off northwest Scotland. The record extends back to around 45 kyr B.P., with sedimentation rates ranging between 50 and 200 cm/kyr. The abundance of ice-rafted debris indicates 16 glacimarine events, including temporal equivalents to Heinrich events 1-4. Enhanced concentrations of basaltic material derived from the British Tertiary Province suggest that the glacimarine sediments record variations in a glacial source on the Hebrides shelf margin. Glacimarine zones are separated by silty intervals with high planktonic foraminifera concentrations that reflect an interstadial circulation regime in the Rockall Trough. The results suggest that the last British Ice Sheet fluctuated with a periodicity of 2000-3000 years, in common with the Dansgaard-Oeschger climate cycle. |
format |
Article in Journal/Newspaper |
author |
Knutz, PC Austin, William Edward Newns Jones, EJW |
author_facet |
Knutz, PC Austin, William Edward Newns Jones, EJW |
author_sort |
Knutz, PC |
title |
Millennial-scale depositional cycles related to British Ice Sheet variability and North Atlantic paleocirculation since 45 kyr B.P., Barra Fan, U.K. margin |
title_short |
Millennial-scale depositional cycles related to British Ice Sheet variability and North Atlantic paleocirculation since 45 kyr B.P., Barra Fan, U.K. margin |
title_full |
Millennial-scale depositional cycles related to British Ice Sheet variability and North Atlantic paleocirculation since 45 kyr B.P., Barra Fan, U.K. margin |
title_fullStr |
Millennial-scale depositional cycles related to British Ice Sheet variability and North Atlantic paleocirculation since 45 kyr B.P., Barra Fan, U.K. margin |
title_full_unstemmed |
Millennial-scale depositional cycles related to British Ice Sheet variability and North Atlantic paleocirculation since 45 kyr B.P., Barra Fan, U.K. margin |
title_sort |
millennial-scale depositional cycles related to british ice sheet variability and north atlantic paleocirculation since 45 kyr b.p., barra fan, u.k. margin |
publishDate |
2001 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/millennialscale-depositional-cycles-related-to-british-ice-sheet-variability-and-north-atlantic-paleocirculation-since-45-kyr-bp-barra-fan-uk-margin(ebb5d802-ff5f-4e48-af5f-d2a794ed761d).html https://doi.org/10.1029/1999PA000483 http://www.scopus.com/inward/record.url?scp=0035062527&partnerID=8YFLogxK |
long_lat |
ENVELOPE(-61.417,-61.417,-64.367,-64.367) ENVELOPE(-15.036,-15.036,53.825,53.825) |
geographic |
Barra Greenland Norwegian Sea Rockall Trough |
geographic_facet |
Barra Greenland Norwegian Sea Rockall Trough |
genre |
Greenland Ice Sheet Labrador Sea North Atlantic Norwegian Sea Planktonic foraminifera |
genre_facet |
Greenland Ice Sheet Labrador Sea North Atlantic Norwegian Sea Planktonic foraminifera |
op_source |
Knutz , PC , Austin , W E N & Jones , EJW 2001 , ' Millennial-scale depositional cycles related to British Ice Sheet variability and North Atlantic paleocirculation since 45 kyr B.P., Barra Fan, U.K. margin ' , Paleoceanography , vol. 16 , no. 1 , pp. 53-64 . https://doi.org/10.1029/1999PA000483 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/millennialscale-depositional-cycles-related-to-british-ice-sheet-variability-and-north-atlantic-paleocirculation-since-45-kyr-bp-barra-fan-uk-margin(ebb5d802-ff5f-4e48-af5f-d2a794ed761d).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1029/1999PA000483 |
container_title |
Paleoceanography |
container_volume |
16 |
container_issue |
1 |
container_start_page |
53 |
op_container_end_page |
64 |
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1802644943720677376 |