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dc.contributor.author
Gugliotta, Marcello  
dc.contributor.author
Flint, Stephen  
dc.contributor.author
Hodgson, David  
dc.contributor.author
Veiga, Gonzalo Diego  
dc.date.available
2024-06-25T13:53:32Z  
dc.date.issued
2012  
dc.identifier.citation
Rhythmic vs Episodic: The stratigraphic record of the tidal and fluvial interactions in marginal marine, non-channelised setting (Lajas Formation, Neuquen Basin, Argentina); 51st British Sedimentological Research Group Annual General Meeting; Dublin; Irlanda; 2012; 102-102  
dc.identifier.uri
http://hdl.handle.net/11336/238448  
dc.description.abstract
The transition from fluvial to tidal settings includes a relatively wide zone characterized by the interaction of unidirectional fluvial currents, oscillatory tidal currents and other shallow-marine processes. Most studies on the fluvial-tidal transition have been carried out in channelized settings, thus how tidal and fluvial processes interact in nonchannelized areas is not still completely understood. The tide-influenced Middle Jurassic Lajas Formation is well exposed in several kilometres long outcrops, which offer an opportunity to investigate fluvial-tidal interactions in marginal marine, non-channelized settings. Many stratigraphic sections have been studied in detail by sedimentological logging, facies and geometry analysis. Photopanel interpretations were also made to capture architecture. The 50 m thick study section shows an overall regressive trend, passing from marine mudstones/shell-rich beds, into subtidal-to-intertidal flat-bedded sandy-heterolithic deposits and ending with upper intertidal mudflat deposits and supratidal carbonaceous black siltstones and shales. Non-channelized tidal deposits are organized into regressive fining upward cycles (1-3 m thick) typically showing rhythmical interbedding and/or interlamination, bidirectional current ripples, 3D dunes with bundling and abundant coaly/muddy drapes. These deposits are usually cut by tidal, fluvial and tidal\fluvial channels or by moderately\well sorted tabular sandstones deposited during episodic floods due to stronger fluvial input. These latter deposits usually show erosive bases, ripup mud clasts and small-scale load structures and may be organized into bedsets (1-2 m thick) with a coarsening and thickening upward trend. The initial interpretation of depositional environment is that of a bay in which fluvial process can locally be dominant, but in which tidal processes prevail away from fluvial input points and at times between seasonal (?) river floods. The exact nature of the coastline is yet to be determined.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
British Sedimentological Research Group  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Sedimentologia  
dc.subject
Estratigrafía  
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Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente  
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Ciencias de la Tierra y relacionadas con el Medio Ambiente  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Rhythmic vs Episodic: The stratigraphic record of the tidal and fluvial interactions in marginal marine, non-channelised setting (Lajas Formation, Neuquen Basin, Argentina)  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.type
info:eu-repo/semantics/conferenceObject  
dc.type
info:ar-repo/semantics/documento de conferencia  
dc.date.updated
2024-05-16T14:51:09Z  
dc.journal.pagination
102-102  
dc.journal.pais
Irlanda  
dc.journal.ciudad
Dublin  
dc.description.fil
Fil: Gugliotta, Marcello. University of Manchester; Reino Unido  
dc.description.fil
Fil: Flint, Stephen. University of Manchester; Reino Unido  
dc.description.fil
Fil: Hodgson, David. University of Leeds; Reino Unido  
dc.description.fil
Fil: Veiga, Gonzalo Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.bsrg.org.uk/meetings_agms_reviews/BSRG2012_abstract_volume.pdf  
dc.conicet.rol
Autor  
dc.conicet.rol
Autor  
dc.conicet.rol
Autor  
dc.conicet.rol
Autor  
dc.coverage
Internacional  
dc.type.subtype
Conferencia  
dc.description.nombreEvento
51st British Sedimentological Research Group Annual General Meeting  
dc.date.evento
2012-12-18  
dc.description.ciudadEvento
Dublin  
dc.description.paisEvento
Irlanda  
dc.type.publicacion
Book  
dc.description.institucionOrganizadora
British Sedimentological Research Group  
dc.description.institucionOrganizadora
University College Dublin  
dc.source.libro
British Sedimentological Research Group 51st Annual General Meeting. Programme and Abstracts  
dc.date.eventoHasta
2012-12-20  
dc.type
Conferencia