Mostrar el registro sencillo del ítem
dc.contributor.author
Strömback, Anna
dc.contributor.author
Howell, John
dc.contributor.author
Veiga, Gonzalo Diego
dc.contributor.other
Veiga, Gonzalo Diego
dc.contributor.other
Spalletti, Luis Antonio
dc.contributor.other
Howell, John
dc.contributor.other
Schwarz, Ernesto
dc.date.available
2020-06-29T14:43:48Z
dc.date.issued
2005
dc.identifier.citation
Strömback, Anna; Howell, John; Veiga, Gonzalo Diego; The transgression of an erg - sedimentation and reworking/soft-sediment deformation of aeolian facies: the Cretaceous Troncoso Member, Neuquén Basin, Argentina; Geological Society ; 252; 2005; 163-183
dc.identifier.isbn
1-86239-190-4
dc.identifier.uri
http://hdl.handle.net/11336/108391
dc.description.abstract
The Cretaceous Troncoso Inferior Member of the Huitrín Formation comprises fluvial and aeolian facies that form a drying-upwards succession within the Neuquén Basin. The basal fluvial sandstones were deposited as braided river deposits and lie unconformably on top of either the deep-marine Agrio Formation or, locally, the shallow-marine Chorreado Member (Huitrín Formation.). In places, the fluvial sandstones are interbedded with remnants of aeolian deposits recording an arid environment and ephemeral flows. In the study area the upper section is predominantly aeolian and was controlled by northerly winds with both linear and transverse dune types being deposited. The depositional system was rapidly flooded and dune topography (relief ranging between 2 and 35 m) was preserved on its top surface. In addition to dune topography, the Troncoso dunes also show evidence of reworking and in situ soft-sediment deformation related to the flooding. The principal aim of this paper is to document the soft-sediment deformation and preservation of topography associated with the flooding of the dune field. Within the soft sediment deformed and reworked sediments at the top of the Troncoso Inferior Member spatial and temporal relationships indicate that they formed in a specific sequence. Initially, water-escape processes created convolutedly folded and dish structures that were concentrated in areas of slightly higher preserved dune topography. Secondly, the convolutedly folded and dish facies were eroded and reworked by wave undercutting and migrating three-dimensional dunes in a shallow-marine environment. This subaqueous reworking resulted in an interbedded massive and cross-stratified unit. With further deepening of the water, the topography became stabilized and the uppermost part of the interval (0.1–0.3 m) was reworked by waves across most of the basin. In the topographic lows between dunes, liquefaction-induced sediment gravity flows deposited massive-flatlaminated facies. The reworked and soft-sediment deformed aeolian dune topography is overlain by the evaporites of the Troncoso Superior Member. The distribution of flood-related facies and the amount of preserved dune topography (2–35 m) indicates that the transgression must have been rapid but of low energy.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Geological Society
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CUENCA NEUQUINA
dc.subject.classification
Geología
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
The transgression of an erg - sedimentation and reworking/soft-sediment deformation of aeolian facies: the Cretaceous Troncoso Member, Neuquén Basin, Argentina
dc.type
info:eu-repo/semantics/publishedVersion
dc.type
info:eu-repo/semantics/bookPart
dc.type
info:ar-repo/semantics/parte de libro
dc.date.updated
2020-06-23T13:18:16Z
dc.journal.volume
252
dc.journal.pagination
163-183
dc.journal.pais
Reino Unido
dc.journal.ciudad
London
dc.description.fil
Fil: Strömback, Anna. University of Liverpool; Reino Unido
dc.description.fil
Fil: Howell, John. University of Bergen; Noruega
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/doi/https://doi.org/10.1144/GSL.SP.2005.252.01.08
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://sp.lyellcollection.org/content/252/1/163
dc.conicet.paginas
336
dc.source.titulo
The Neuquén Basin: A case study in sequence stratigraphy and basin dynamics
Archivos asociados