Structural and palaeoclimatic implications of submarine gullies on the Gulf of Cadiz upper slope from high and very high resolution seismic stratigraphic studies
3rd Deep-Water Circulation Conference (3DWC), Multidisciplinary Perspective, 14-16 September 2017, Wuhan - Wu Han The Gulf of Cadiz upper slope records the interplay between mass movement processes, mostly channelized flows along downslope-trending submarine gullies, and the action of bottom current...
Main Authors: | , , , , , , |
---|---|
Format: | Conference Object |
Language: | unknown |
Published: |
2017
|
Subjects: | |
Online Access: | http://hdl.handle.net/10261/179862 |
id |
ftcsic:oai:digital.csic.es:10261/179862 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/179862 2024-02-11T10:06:46+01:00 Structural and palaeoclimatic implications of submarine gullies on the Gulf of Cadiz upper slope from high and very high resolution seismic stratigraphic studies García, Marga Llave, Estefanía Hernández-Molina, Francisco J. Mena, Anxo Ercilla, Gemma Casas, David Fernández-Salas, L. M. 2017-09-14 http://hdl.handle.net/10261/179862 unknown Sí 3rd Deep-Water Circulation Conference (2017) http://hdl.handle.net/10261/179862 none comunicación de congreso http://purl.org/coar/resource_type/c_5794 2017 ftcsic 2024-01-16T10:38:12Z 3rd Deep-Water Circulation Conference (3DWC), Multidisciplinary Perspective, 14-16 September 2017, Wuhan - Wu Han The Gulf of Cadiz upper slope records the interplay between mass movement processes, mostly channelized flows along downslope-trending submarine gullies, and the action of bottom currents, in an area where paleoclimatic changes may have led to important variations of the oceanographic conditions, especially between glacial and interglacial periods. This work investigates the evolution of downslope-trending gullies in the upper slope of the Gulf of Cadiz, based on the analysis of high and very high resolution seismic record (Parasound and airgun profiles) and their correlation with regional stratigraphic interpretations. The gullies can be identified in the present-day seafloor as parallel downslope-trending features (10-15 km long, 1-1.5 km wide, up to 50 m deep). Their heads lie below the continental shelf-break and they terminate abruptly at the base of the upper slope, where they meet the Cadiz Contourite Channel along the middle slope. A seismic stratigraphic correlation allows identifying gully-like depressions in the seismic record from the Middle Pleistocene. Their high spatial and temporal variability can be related to the activity of the deep structures (particularly diapiric ridges) and in some cases to fluid escape processes that affect the region. The evolution of the gullies since the Mid Pleistocene can be established in order to infer the effect of climatic and structural changes that affect the circulation patters in the Gulf of Cadiz (i.e., changes in the trend, depth and velocity of the Mediterranean Outflow Water and other water masses such as the Eastern North Atlantic Central Water and the Superficial Atlantic Water but also changes affecting the interfases between water masses) from the variations in the sedimentation processes of the upper slope Peer Reviewed Conference Object North Atlantic Digital.CSIC (Spanish National Research Council) |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
description |
3rd Deep-Water Circulation Conference (3DWC), Multidisciplinary Perspective, 14-16 September 2017, Wuhan - Wu Han The Gulf of Cadiz upper slope records the interplay between mass movement processes, mostly channelized flows along downslope-trending submarine gullies, and the action of bottom currents, in an area where paleoclimatic changes may have led to important variations of the oceanographic conditions, especially between glacial and interglacial periods. This work investigates the evolution of downslope-trending gullies in the upper slope of the Gulf of Cadiz, based on the analysis of high and very high resolution seismic record (Parasound and airgun profiles) and their correlation with regional stratigraphic interpretations. The gullies can be identified in the present-day seafloor as parallel downslope-trending features (10-15 km long, 1-1.5 km wide, up to 50 m deep). Their heads lie below the continental shelf-break and they terminate abruptly at the base of the upper slope, where they meet the Cadiz Contourite Channel along the middle slope. A seismic stratigraphic correlation allows identifying gully-like depressions in the seismic record from the Middle Pleistocene. Their high spatial and temporal variability can be related to the activity of the deep structures (particularly diapiric ridges) and in some cases to fluid escape processes that affect the region. The evolution of the gullies since the Mid Pleistocene can be established in order to infer the effect of climatic and structural changes that affect the circulation patters in the Gulf of Cadiz (i.e., changes in the trend, depth and velocity of the Mediterranean Outflow Water and other water masses such as the Eastern North Atlantic Central Water and the Superficial Atlantic Water but also changes affecting the interfases between water masses) from the variations in the sedimentation processes of the upper slope Peer Reviewed |
format |
Conference Object |
author |
García, Marga Llave, Estefanía Hernández-Molina, Francisco J. Mena, Anxo Ercilla, Gemma Casas, David Fernández-Salas, L. M. |
spellingShingle |
García, Marga Llave, Estefanía Hernández-Molina, Francisco J. Mena, Anxo Ercilla, Gemma Casas, David Fernández-Salas, L. M. Structural and palaeoclimatic implications of submarine gullies on the Gulf of Cadiz upper slope from high and very high resolution seismic stratigraphic studies |
author_facet |
García, Marga Llave, Estefanía Hernández-Molina, Francisco J. Mena, Anxo Ercilla, Gemma Casas, David Fernández-Salas, L. M. |
author_sort |
García, Marga |
title |
Structural and palaeoclimatic implications of submarine gullies on the Gulf of Cadiz upper slope from high and very high resolution seismic stratigraphic studies |
title_short |
Structural and palaeoclimatic implications of submarine gullies on the Gulf of Cadiz upper slope from high and very high resolution seismic stratigraphic studies |
title_full |
Structural and palaeoclimatic implications of submarine gullies on the Gulf of Cadiz upper slope from high and very high resolution seismic stratigraphic studies |
title_fullStr |
Structural and palaeoclimatic implications of submarine gullies on the Gulf of Cadiz upper slope from high and very high resolution seismic stratigraphic studies |
title_full_unstemmed |
Structural and palaeoclimatic implications of submarine gullies on the Gulf of Cadiz upper slope from high and very high resolution seismic stratigraphic studies |
title_sort |
structural and palaeoclimatic implications of submarine gullies on the gulf of cadiz upper slope from high and very high resolution seismic stratigraphic studies |
publishDate |
2017 |
url |
http://hdl.handle.net/10261/179862 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Sí 3rd Deep-Water Circulation Conference (2017) http://hdl.handle.net/10261/179862 |
op_rights |
none |
_version_ |
1790604713825140736 |