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dc.contributor.author
Caratelli, Martina
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dc.contributor.author
Archuby, Fernando
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dc.contributor.author
Pignatti, Johannes
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dc.date.available
2023-07-05T18:02:07Z
dc.date.issued
2020
dc.identifier.citation
Agglutinated encrusting foraminifers from the Agua de la Mula member (Agrio Formation, Neuquén Basin - Argentina): Paleoeocological and paleoenvironmental implications; 2nd Palaeontological Virtual Congress; Valencia; España; 2020; 122-122
dc.identifier.isbn
978-84-09-20283-6
dc.identifier.uri
http://hdl.handle.net/11336/202504
dc.description.abstract
A new fauna consisting of agglutinated encrusting foraminifers has been collected from several nodular levels in the upper Hauterivian-lower Barremian Agua de la Mula Member of the Agrio Formation (Patagonia, Argentina). The study foraminifers come from two stratigraphic sections in the Neuquen Basin and show affinities with the genera Haddonia Chapman, 1898, Alpinophragmium Flügel, 1967, Bdelloidina Carter, 1877 and Coscinophragma Thalmann, 1951. Provisionally, the new specimens are considered to differ from the above-mentioned genera, but they remain in open nomenclature. One or more specimens are clustered around bioclastic nuclei of cerebroidal sub-spherical nodules, forming columnar and circum-granular ‘microbuildups’. The nodules occur both separated from each other in a fine-grained siliciclastic matrix as well as forming larger moundlike accumulations of up to 2 meters in thickness. The encrusting foraminifers-bearing deposits consist of bioclastic sandstone, allochemic mudrock and micritic rudstone, and are embedded into an alternation of condensed bioclastic sandstone and grey/dark marly clay. The latter has been earlier interpreted as alternating couplets of sixth-order Milankovitch precession-driven cycles, named starvation/dilution sequences. These couplets are characterised by a switch from very low to high sedimentation rates, as recorded by deposition of condensed beds and siliciclastic intervals respectively. Semiquantitative analysis by Scanning Electron Microscope (SEM) was performed in order to characterise the morphology and test mineralogy of the specimens. A preliminary study on the type of growth of the ‘microbuildups’ allows us to corroborate previous interpretations of low oxygen conditions and of a lowered rate of terrigenous input for the analysed interval.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Palaeontological Virtual Congress
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Encrusting foraminifers
dc.subject
Agua de la Mula Member
dc.subject
Neuquén Basin
dc.subject.classification
Paleontología
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Agglutinated encrusting foraminifers from the Agua de la Mula member (Agrio Formation, Neuquén Basin - Argentina): Paleoeocological and paleoenvironmental implications
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
2023-02-16T10:52:14Z
dc.journal.pagination
122-122
dc.journal.pais
España
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dc.journal.ciudad
Valencia
dc.description.fil
Fil: Caratelli, Martina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
dc.description.fil
Fil: Archuby, Fernando. Centro En Estudios Integrales de la Dinamica Exogeno (ceide) ; Facultad de Cs.agrarias y Forestales ; Universidad Nacional de la Plata; . Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Pignatti, Johannes. Università degli Studi di Roma "La Sapienza"; Italia
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.uv.es/palaeovc/Documentos%20/2nd%20PVC/2nd_PVC_Book_of_Abstracts.pdf
dc.conicet.rol
Autor
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dc.conicet.rol
Autor
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dc.conicet.rol
Autor
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dc.coverage
Internacional
dc.type.subtype
Congreso
dc.description.nombreEvento
2nd Palaeontological Virtual Congress
dc.date.evento
2020-05-01
dc.description.ciudadEvento
Valencia
dc.description.paisEvento
España
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dc.type.publicacion
Book
dc.description.institucionOrganizadora
Palaeontological Virtual Congress
dc.source.libro
2nd Palaeontological Virtual Congress: Book of Abstracts. Palaeontology in the virtual era
dc.date.eventoHasta
2020-05-15
dc.type
Congreso
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