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Sand deposits of a Gilbert type delta in the Urgonian of Laga (Bizkaia): Facies and sedimentary processes

dc.contributor.authorAgirrezabala, Luis Miguel
dc.contributor.authorGarcía Mondéjar, Joaquín
dc.description.abstractSand and silt deposits of a fluvial-dominated Gilbert type delta corresponding to an Urgonian mixed platform are described and interpreted. Their outcrop in Laga beach (Bizkaia) allows the recognition of10 sedimentary fades and the construction of a 70 m long and 11.5 m high detailed cross-section, showing the typical tripartite depositional geometry. Topset deposits are horizontally bedded fluvial sandstones with Internal trough cross-stratification. Foreset deposits, up to 28° dip, are composed of interbedded sandstones and fallout siltstones; sandstones were deposited by supercritic flows (chutes-and-pools, antidunes and plane beds) and gravity flows (sand flows, slumps, slides and creep?). Bottomset deposits, up to 5° dip, are composed of fallout siltstones and turbiditic sandstones. The development of the delta was related with active tiltingen_US
dc.publisherSociedad Geológica de Españaen_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subject.otherGilbert type deltaen_US
dc.subject.otherUrgonian mixed platformen_US
dc.subject.otherBasque-Cantabrian Basinen_US
dc.titleDepósitos arenosos de un delta tipo Gilbert en el Urgoniano de Laga (Bizkaia): Facies y procesos sedimentariosen_US
dc.titleSand deposits of a Gilbert type delta in the Urgonian of Laga (Bizkaia): Facies and sedimentary processeseng

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