Evolution of the Galicia Interior Basin over the last 60 ka: sedimentary processes and palaeoceanographic implications
ABSTRACT The Galicia Interior Basin (GIB; NW Iberian Peninsula) is located near a critical transition between the subtropical (temperate) and subpolar (cold) gyres of the North Atlantic. It therefore witnesses oceanographic changes driven by global climatic events. This study reports on the recent (...
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crwiley:10.1002/jqs.3032 2023-10-29T02:38:30+01:00 Evolution of the Galicia Interior Basin over the last 60 ka: sedimentary processes and palaeoceanographic implications Mena, Anxo Francés, Guillermo Pérez‐Arlucea, Marta Hanebuth, Till J. J. Bender, Vera B. Nombela, Miguel A. Consellería de Cultura, Educación e Ordenación Universitaria, Xunta de Galicia 2018 http://dx.doi.org/10.1002/jqs.3032 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.3032 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3032 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Journal of Quaternary Science volume 33, issue 5, page 536-549 ISSN 0267-8179 1099-1417 Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) journal-article 2018 crwiley https://doi.org/10.1002/jqs.3032 2023-10-02T16:39:55Z ABSTRACT The Galicia Interior Basin (GIB; NW Iberian Peninsula) is located near a critical transition between the subtropical (temperate) and subpolar (cold) gyres of the North Atlantic. It therefore witnesses oceanographic changes driven by global climatic events. This study reports on the recent (latest Pleistocene) sedimentary, palaeoceanographic and palaeoclimatic history of the basin. We integrated analysis of deep‐sea sediment cores retrieved from an E–W transect across the GIB. The analysis indicated three types of sedimentary processes recording glacial (Marine Isotope Stage 2–4) and deglacial events: along‐slope bottom currents (forming contourite deposits), pelagic and hemipelagic sedimentation, and gravitational dislocation. Variation in depositional patterns and sedimentation rates indicate distinctive transport (along‐slope and down‐slope) and depositional processes. These in turn reflect climatic and oceanographic drivers. We interpret changes in sea level from core evidence showing changes in sediment supply. The cores exhibited conspicuous sedimentary evidence of Heinrich events (HEs). The stratigraphic intervals associated with HEs showed significant lateral variation. We suggest that the lateral variation may result from the development of an oceanographic boundary between surface water masses with different temperature and salinity parameters or changes in surface currents which may have introduced relatively warmer water into the GIB during the last glacial period. Article in Journal/Newspaper North Atlantic Wiley Online Library (via Crossref) Journal of Quaternary Science 33 5 536 549 |
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Open Polar |
collection |
Wiley Online Library (via Crossref) |
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crwiley |
language |
English |
topic |
Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) |
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Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) Mena, Anxo Francés, Guillermo Pérez‐Arlucea, Marta Hanebuth, Till J. J. Bender, Vera B. Nombela, Miguel A. Evolution of the Galicia Interior Basin over the last 60 ka: sedimentary processes and palaeoceanographic implications |
topic_facet |
Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) |
description |
ABSTRACT The Galicia Interior Basin (GIB; NW Iberian Peninsula) is located near a critical transition between the subtropical (temperate) and subpolar (cold) gyres of the North Atlantic. It therefore witnesses oceanographic changes driven by global climatic events. This study reports on the recent (latest Pleistocene) sedimentary, palaeoceanographic and palaeoclimatic history of the basin. We integrated analysis of deep‐sea sediment cores retrieved from an E–W transect across the GIB. The analysis indicated three types of sedimentary processes recording glacial (Marine Isotope Stage 2–4) and deglacial events: along‐slope bottom currents (forming contourite deposits), pelagic and hemipelagic sedimentation, and gravitational dislocation. Variation in depositional patterns and sedimentation rates indicate distinctive transport (along‐slope and down‐slope) and depositional processes. These in turn reflect climatic and oceanographic drivers. We interpret changes in sea level from core evidence showing changes in sediment supply. The cores exhibited conspicuous sedimentary evidence of Heinrich events (HEs). The stratigraphic intervals associated with HEs showed significant lateral variation. We suggest that the lateral variation may result from the development of an oceanographic boundary between surface water masses with different temperature and salinity parameters or changes in surface currents which may have introduced relatively warmer water into the GIB during the last glacial period. |
author2 |
Consellería de Cultura, Educación e Ordenación Universitaria, Xunta de Galicia |
format |
Article in Journal/Newspaper |
author |
Mena, Anxo Francés, Guillermo Pérez‐Arlucea, Marta Hanebuth, Till J. J. Bender, Vera B. Nombela, Miguel A. |
author_facet |
Mena, Anxo Francés, Guillermo Pérez‐Arlucea, Marta Hanebuth, Till J. J. Bender, Vera B. Nombela, Miguel A. |
author_sort |
Mena, Anxo |
title |
Evolution of the Galicia Interior Basin over the last 60 ka: sedimentary processes and palaeoceanographic implications |
title_short |
Evolution of the Galicia Interior Basin over the last 60 ka: sedimentary processes and palaeoceanographic implications |
title_full |
Evolution of the Galicia Interior Basin over the last 60 ka: sedimentary processes and palaeoceanographic implications |
title_fullStr |
Evolution of the Galicia Interior Basin over the last 60 ka: sedimentary processes and palaeoceanographic implications |
title_full_unstemmed |
Evolution of the Galicia Interior Basin over the last 60 ka: sedimentary processes and palaeoceanographic implications |
title_sort |
evolution of the galicia interior basin over the last 60 ka: sedimentary processes and palaeoceanographic implications |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/jqs.3032 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.3032 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3032 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of Quaternary Science volume 33, issue 5, page 536-549 ISSN 0267-8179 1099-1417 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1002/jqs.3032 |
container_title |
Journal of Quaternary Science |
container_volume |
33 |
container_issue |
5 |
container_start_page |
536 |
op_container_end_page |
549 |
_version_ |
1781064607415140352 |