Geomorphological analysis on the Alentejo Margin: features and processes

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dc.contributor.author Teixeira, Manuel
dc.contributor.author Rodrigues, Sara
dc.contributor.author Roque, Cristina
dc.contributor.author Terrinha, Pedro
dc.contributor.author Ercilla, Gemma
dc.contributor.author Casas Layola, David
dc.date.accessioned 2021-08-27T05:24:24Z
dc.date.available 2021-08-27T05:24:24Z
dc.date.issued 2018
dc.identifier.citation Atas do IX Simpósio sobre a Margem Ibérica Atlântica, p.43-44 es_ES
dc.identifier.isbn 978-989-98914-2-5
dc.identifier.uri http://hdl.handle.net/20.500.12468/1290
dc.description Simposio sobre el Margen Ibérico Atlántico (9º. 2018. Coimbra, Portugal) es_ES
dc.description.abstract The Alentejo Margin is a geomorphological complex area, where the interaction of bottom-currents with the irregular seafloor and gravitational processes creates a set of different along-slope and downslope-driven sedimentary features, such as drifts, moats, sediment waves, gullies and landslides scars and debris flow deposits. These features have been identified through the analysis of multibeam bathymetry and multichannel seismic data. Several landslide scars appear in the area, mostly in the western side of the contourite drift near the steep-slope Pereira de Sousa Fault scarp, with areas ranging from 0.15 to 40.3 km2, and volumes ranging from 0.01 to 6.34 km3. Thick debris flow deposits accumulate in the Lebre Basin (LB), downstream the scars, being fed by gullies coming from upstream with ~30 to ~120 m depth and ~2 km to ~20 km length. A ~2311-km2 contourite drift, with a ~84-km length moat, eastwards, is deposited by the Mediterranean Outflow Water (MOW), which creates sediment waves with varied extensions (~9 to 32 km) on this drift. The geomorphology of the Alentejo margin reflects a complex multi-process interaction, including bottom-current circulation, gravity-driven processes and tectonics. The interaction between these processes favoured active slope instability. es_ES
dc.description.sponsorship Instituto Dom Luiz, Portugal es_ES
dc.description.sponsorship Instituto Português do Mar e da Atmosfera, Portugal es_ES
dc.description.sponsorship Estrutura de Missão para a Extensão da Plataforma Continental, Portugal es_ES
dc.description.sponsorship Instituto de Ciencias del Mar, España es_ES
dc.description.sponsorship Instituto Geológico y Minero de España, España es_ES
dc.language.iso en es_ES
dc.publisher Departamento de Ciências da Terra da Universidade de Coimbra es_ES
dc.relation CONDRIBER (FCT – PTDC/GEOGEO/ 4430/2012) es_ES
dc.relation MOWER (CTM (2012)-39599-C03-02) es_ES
dc.relation SFRH/BD/110674/2015 es_ES
dc.relation UID/GEO/50019/2013 es_ES
dc.rights Otro es_ES
dc.subject geomorphological feature es_ES
dc.subject along-slope process es_ES
dc.subject gravity-driven process es_ES
dc.subject slope instability es_ES
dc.subject contourite feature es_ES
dc.subject landslide es_ES
dc.subject congreso es_ES
dc.subject Alentejo es_ES
dc.subject margen continental
dc.title Geomorphological analysis on the Alentejo Margin: features and processes es_ES
dc.type Postprint es_ES
dc.relation.publisherversion https://c17f9f65-7617-42c3-8498-28f112c832c3.filesusr.com/ugd/4b1afe_b347c0a3b2224e01b923ae8076de19cc.pdf es_ES
dc.description.funder Fundação para a Ciência e Tecnologia, Portugal es_ES
dc.description.funder Ministerio de Economía y Competitividad, España es_ES
dc.description.funder British Petroleum, Reino Unido es_ES
dc.description.funder Instituto Dom Luiz, Portugal es_ES
dc.coverage.spatialStudy Alentejo, Portugal es_ES


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