The tributary valley systems of the Almeria Canyon (Alboran Sea, SW Mediterranean): Sedimentary architecture

The tributary valley systems of the Almeria Canyon (Alboran Sea, SW Mediterranean): Sedimentary architecture

17 pages, 9 figures, 3 tables

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Bibliographic Details
Main Authors: García, Marga, Alonso, Belén, Ercilla, Gemma, Gràcia, Eulàlia
Format: artículo biblioteca
Language:English
Published: Elsevier 2006-02-28
Subjects:Leveed channels, Gullies, Alboran Sea, Seismic stratigraphy, Swath bathymetry,
Online Access:http://hdl.handle.net/10261/27369
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spelling dig-icm-es-10261-273692020-11-10T10:13:07Z The tributary valley systems of the Almeria Canyon (Alboran Sea, SW Mediterranean): Sedimentary architecture García, Marga Alonso, Belén Ercilla, Gemma Gràcia, Eulàlia Leveed channels Gullies Alboran Sea Seismic stratigraphy Swath bathymetry 17 pages, 9 figures, 3 tables Three tributary valley systems of the Almeria Canyon (Dalias, Andarax and Gata) located on the Almeria Margin (Alboran Sea, SW Mediterranean) were studied using high-resolution techniques including swath bathymetry and TOPAS seismic reflection profiles. A detailed morphological and seismic stratigraphy study shows that the tributary valley systems (TVS) are formed by two types of valleys: gullies and leveed channels. Dalias TVS is the best developed system, covering an area of more than 300 km2 from the shelf-edge off Cabo de Dalias to the Almeria Canyon (100–1500 m depth). Andarax TVS covers about 65 km2, from the shelf off the Andarax River mouth to the westernmost branch of the Almeria Canyon (40–300 m depth). Gata TVS covers more than 100 km2 from the shelf-edge off Cabo de Gata to the Almeria Canyon (200–650 m depth). Tributary valley systems can be divided into two models based on the detailed morpho-seismic study: the sea level-controlled model and the sediment supply-controlled model. The sea level-controlled model includes the Dalias and Gata TVS. This model is mainly governed by sea level fluctuations, and the valleys grow as a result of the activity of turbidity currents and hemipelagic sedimentation, displaying a retrogressive upslope pattern. The valleys' development would have been favoured by glacio-eustatic oscillations during the Late Quaternary. A tentative chronostratigraphic correlation has been made, relating the evolution of Dalias and Gata TVS with the Marine Isotopic Stages and sea level curves. Tectonics and margin physiography play a secondary role in the development of this type of valley. The sediment supply-controlled model is applicable to the Andarax TVS. The growth of the valleys is controlled by the ephemeral sediment discharges from the Andarax River. The valleys are small-scale gullies located on the shelf and slope, which would grow as a result of the turbidity currents which channel the fluvial sediment supplied in form of hyperpycnal currents. This model would have been developed during the last highstand of sea level, once the coast-line reached its present situation This work was developed in the framework of the MARSIBAL project (REN2001-3868-C03-03) and the WESTMED project (01-LF-EMA22F) and is based on data from the HITS project (REN 2000-2150E and EASSIIIH HPR1-CT99-0047) and from the Programme “Fishing Cartography of the Alboran Sea” financed by the General Secretary for Maritime Fishing and the Spanish Oceanographic Institute. The research activity was supported by a FPI fellowship from the Spanish Education and Science Ministry Peer reviewed 2010-09-01T09:46:31Z 2010-09-01T09:46:31Z 2006-02-28 artículo http://purl.org/coar/resource_type/c_6501 Marine Geology 226(3-4): 207-223 (2006) 0025-3227 http://hdl.handle.net/10261/27369 10.1016/j.margeo.2005.10.002 en https://doi.org/10.1016/j.margeo.2005.10.002 none 5867 bytes application/pdf Elsevier
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
topic Leveed channels
Gullies
Alboran Sea
Seismic stratigraphy
Swath bathymetry
Leveed channels
Gullies
Alboran Sea
Seismic stratigraphy
Swath bathymetry
spellingShingle Leveed channels
Gullies
Alboran Sea
Seismic stratigraphy
Swath bathymetry
Leveed channels
Gullies
Alboran Sea
Seismic stratigraphy
Swath bathymetry
García, Marga
Alonso, Belén
Ercilla, Gemma
Gràcia, Eulàlia
The tributary valley systems of the Almeria Canyon (Alboran Sea, SW Mediterranean): Sedimentary architecture
description 17 pages, 9 figures, 3 tables
format artículo
topic_facet Leveed channels
Gullies
Alboran Sea
Seismic stratigraphy
Swath bathymetry
author García, Marga
Alonso, Belén
Ercilla, Gemma
Gràcia, Eulàlia
author_facet García, Marga
Alonso, Belén
Ercilla, Gemma
Gràcia, Eulàlia
author_sort García, Marga
title The tributary valley systems of the Almeria Canyon (Alboran Sea, SW Mediterranean): Sedimentary architecture
title_short The tributary valley systems of the Almeria Canyon (Alboran Sea, SW Mediterranean): Sedimentary architecture
title_full The tributary valley systems of the Almeria Canyon (Alboran Sea, SW Mediterranean): Sedimentary architecture
title_fullStr The tributary valley systems of the Almeria Canyon (Alboran Sea, SW Mediterranean): Sedimentary architecture
title_full_unstemmed The tributary valley systems of the Almeria Canyon (Alboran Sea, SW Mediterranean): Sedimentary architecture
title_sort tributary valley systems of the almeria canyon (alboran sea, sw mediterranean): sedimentary architecture
publisher Elsevier
publishDate 2006-02-28
url http://hdl.handle.net/10261/27369
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