Publication:
Facies characterization and sequential evolution of an ancient offshore dunefield in a semi-enclosed sea: Neuquén Basin, Argentina

dc.creatorVeiga, Gonzalo Diego
dc.creatorSchwarz, Ernesto
dc.date.issued2017-08
dc.description.abstractThis study analyses a 30-m-thick, sand-dominated succession intercalated between offshore mudstones in the Lower Cretaceous record of the Neuquén Basin, Argentina, defining facies associated with unidirectional currents as sand dunes (simple and compound), rippled sand sheets and heterolithic sheets. These facies associations are related to the development of an offshore, forward-accreting dunefield developed as a response to the onset of a tidal-transport system. The reported stratigraphic record results from the combination of the gradual downcurrent decrease of the current speed together with the long-term climbing of the entire system. Maximum amplification of the tidal effect associated with incoming oceanic tides to this epicontinental sea would develop at the time of more efficient connection between the basin and the open ocean. Thus, the onset of the offshore tidal system approximately corresponds to the time of maximum flooding conditions (or immediately after). The short-term evolution of the tidal-transport system is more complex and characterized by the vertical stacking of small-scale cycles defined by the alternation of episodes of construction and destruction of the dunefield. The development of these cycles could be the response to changes in tidal current speed and transport capacity.
dc.identifierVeiga, Gonzalo Diego; Schwarz, Ernesto; Facies characterization and sequential evolution of an ancient offshore dunefield in a semi-enclosed sea: Neuquén Basin, Argentina; Springer; Geo-marine Letters; 37; 4; 8-2017; 411-426
dc.identifier0276-0460
dc.identifierhttp://hdl.handle.net/11336/49403
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://naturalis.fcnym.unlp.edu.ar/handle/628872547/57292
dc.languageeng
dc.publisherSpringer
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1007/s00367-016-0467-1
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs00367-016-0467-1
dc.subjectOffshore Dune Field
dc.subjectDepositional Model And Evolution
dc.subjectPilmatué Mb
dc.subjectNeuquén Basin
dc.titleFacies characterization and sequential evolution of an ancient offshore dunefield in a semi-enclosed sea: Neuquén Basin, Argentina
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication

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