Side scan sonar image and geologic interpretation of the Ria de Pontevedra seafloor (Galicia, NW Spain).

High-resolution side scan sonar has been used for mapping the seafloor of the Ría de Pontevedra. Four backscatter patterns have been mapped within the Ría: (1) Pattern with isolated reflections, correlated with granite and metamorphic outcrops and located close to the coastal prominence and Ons and...

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Detalhes bibliográficos
Autores: García Gil, Soledad, Durán, Ruth, Vilas, Federico
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2000
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/32407
Acesso em linha:https://hdl.handle.net/2445/32407
Access Level:acceso abierto
Palavra-chave:Sediments marins
Pontevedra, Ría de (Galícia)
Marine sediments
Pontevedra Estuary (Galicia)
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spelling Side scan sonar image and geologic interpretation of the Ria de Pontevedra seafloor (Galicia, NW Spain).García Gil, SoledadDurán, RuthVilas, FedericoSediments marinsPontevedra, Ría de (Galícia)Marine sedimentsPontevedra Estuary (Galicia)High-resolution side scan sonar has been used for mapping the seafloor of the Ría de Pontevedra. Four backscatter patterns have been mapped within the Ría: (1) Pattern with isolated reflections, correlated with granite and metamorphic outcrops and located close to the coastal prominence and Ons and Onza Islands. (2) Pattern of strong reflectivity usually located around the basement outcrops and near the coastline and produced by coarse-grained sediment. (3) Pattern of weak backscatter is correlated with fine sand to mud and comprising large areas in the central and deep part of the Ría, where the bottom currents are weak. It is generally featureless, except where pockmarks and anthropogenic features are present. (4) Patches of strong and weak backscatter are located in the boundary between coarse and fine-grained sediments and they are due to the effect of strong bottom currents. The presence of megaripples associated to both patterns of strong reflectivity and sedimentary patches indicate bedload transport of sediment during high energy conditions (storms). Side scan sonar records and supplementary bathymetry, bottom samples and hydrodynamic data reveal that the distribution of seafloor sediment is strongly related to oceanographic processes and the particular morphology and topography of the Ría.Consejo Superior de Investigaciones Científicas (CSIC)2012201220002012info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion12 p.application/pdfhttps://hdl.handle.net/2445/32407Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: http://dx.doi.org/10.3989/scimar.2000.64n4393Scientia Marina, 2000, vol. 64, num. 4, p. 393-404http://dx.doi.org/10.3989/scimar.2000.64n4393cc-by-nc (c) Consejo Superior de Investigaciones Científicas (CSIC), 2000http://creativecommons.org/licenses/by-nc/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/324072026-05-29T05:05:01Z
dc.title.none.fl_str_mv Side scan sonar image and geologic interpretation of the Ria de Pontevedra seafloor (Galicia, NW Spain).
title Side scan sonar image and geologic interpretation of the Ria de Pontevedra seafloor (Galicia, NW Spain).
spellingShingle Side scan sonar image and geologic interpretation of the Ria de Pontevedra seafloor (Galicia, NW Spain).
García Gil, Soledad
Sediments marins
Pontevedra, Ría de (Galícia)
Marine sediments
Pontevedra Estuary (Galicia)
title_short Side scan sonar image and geologic interpretation of the Ria de Pontevedra seafloor (Galicia, NW Spain).
title_full Side scan sonar image and geologic interpretation of the Ria de Pontevedra seafloor (Galicia, NW Spain).
title_fullStr Side scan sonar image and geologic interpretation of the Ria de Pontevedra seafloor (Galicia, NW Spain).
title_full_unstemmed Side scan sonar image and geologic interpretation of the Ria de Pontevedra seafloor (Galicia, NW Spain).
title_sort Side scan sonar image and geologic interpretation of the Ria de Pontevedra seafloor (Galicia, NW Spain).
dc.creator.none.fl_str_mv García Gil, Soledad
Durán, Ruth
Vilas, Federico
author García Gil, Soledad
author_facet García Gil, Soledad
Durán, Ruth
Vilas, Federico
author_role author
author2 Durán, Ruth
Vilas, Federico
author2_role author
author
dc.subject.none.fl_str_mv Sediments marins
Pontevedra, Ría de (Galícia)
Marine sediments
Pontevedra Estuary (Galicia)
topic Sediments marins
Pontevedra, Ría de (Galícia)
Marine sediments
Pontevedra Estuary (Galicia)
description High-resolution side scan sonar has been used for mapping the seafloor of the Ría de Pontevedra. Four backscatter patterns have been mapped within the Ría: (1) Pattern with isolated reflections, correlated with granite and metamorphic outcrops and located close to the coastal prominence and Ons and Onza Islands. (2) Pattern of strong reflectivity usually located around the basement outcrops and near the coastline and produced by coarse-grained sediment. (3) Pattern of weak backscatter is correlated with fine sand to mud and comprising large areas in the central and deep part of the Ría, where the bottom currents are weak. It is generally featureless, except where pockmarks and anthropogenic features are present. (4) Patches of strong and weak backscatter are located in the boundary between coarse and fine-grained sediments and they are due to the effect of strong bottom currents. The presence of megaripples associated to both patterns of strong reflectivity and sedimentary patches indicate bedload transport of sediment during high energy conditions (storms). Side scan sonar records and supplementary bathymetry, bottom samples and hydrodynamic data reveal that the distribution of seafloor sediment is strongly related to oceanographic processes and the particular morphology and topography of the Ría.
publishDate 2000
dc.date.none.fl_str_mv 2000
2012
2012
2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/32407
url https://hdl.handle.net/2445/32407
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: http://dx.doi.org/10.3989/scimar.2000.64n4393
Scientia Marina, 2000, vol. 64, num. 4, p. 393-404
http://dx.doi.org/10.3989/scimar.2000.64n4393
dc.rights.none.fl_str_mv cc-by-nc (c) Consejo Superior de Investigaciones Científicas (CSIC), 2000
http://creativecommons.org/licenses/by-nc/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc (c) Consejo Superior de Investigaciones Científicas (CSIC), 2000
http://creativecommons.org/licenses/by-nc/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 12 p.
application/pdf
dc.publisher.none.fl_str_mv Consejo Superior de Investigaciones Científicas (CSIC)
publisher.none.fl_str_mv Consejo Superior de Investigaciones Científicas (CSIC)
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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