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dc.date.accessioned 2021-10-21T16:55:24Z
dc.date.available 2021-10-21T16:55:24Z
dc.date.issued 2019
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/127063
dc.description.abstract Linear aeolian bedforms are the most abundant bedform type in modern Earth sand seas and are very common in our Solar System. Despite their abundance, the long-term development of these bedforms and its impact upon the resulting sedimentary architecture in the geological record is still poorly understood. The aims of this paper are to study the exposed record of an ancient linear megadune in order to discuss the factors that impact the development and sedimentary architecture of aeolian linear bedforms. The outcrops of the ancient Troncoso Sand Sea (Barremian, Neuquen Basin, Argentina) provide a unique opportunity to access a preserved megadune record with an external body geometry that unequivocally confirms its linear morphology. Architectural analysis of the bedform record reveals significant differences for several aspects of cross-stratified set bodies and bounding surfaces and allows for the identification of three architectural complexes. Insights from deterministic models, analysis of set body relative chronology and distribution suggest that complexes result from distinctive phases in bedform development. It also clearly shows that the megadune’s construction was achieved by expansion from a core, where the oldest deposits are located, and that its development was characterized by sustained growth and strong longitudinal dynamics. Factors that impact the development and architecture of linear bedforms are identified, discussed, and compared to bedforms of transverse dynamics. Finally, a scheme of expected styles of sedimentary architecture for linear bedforms is presented. This case study shows how growth can be a critical factor conditioning linear bedform architecture and indicates how the preservation of certain styles of sedimentary architecture in the geological record may not be as unusual as previously thought. en
dc.format.extent 2191-2213 es
dc.language en es
dc.subject Sedimentary architecture es
dc.subject Aeolian linear bedforms es
dc.subject Bedform development es
dc.subject 24 Cretaceous es
dc.subject Neuquén Basin es
dc.subject Troncoso Inferior es
dc.title Sedimentary architecture of an ancient linear megadune (Barremian, Neuquén Basin): insights into the long-term development and evolution of aeolian linear bedforms en
dc.type Articulo es
sedici.identifier.other doi:10.1111/sed.12597 es
sedici.identifier.issn 0037-0746 es
sedici.identifier.issn 1365-3091 es
sedici.creator.person Argüello Scotti, Agustín es
sedici.creator.person Veiga, Gonzalo Diego es
sedici.subject.materias Geología es
sedici.description.fulltext true es
mods.originInfo.place Centro de Investigaciones Geológicas es
sedici.subtype Preprint es
sedici.rights.license Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Sedimentology es
sedici.relation.journalVolumeAndIssue vol. 66, no. 6 es

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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)