Agglutinated encrusting foraminifers from the Agua de la Mula member (Agrio Formation, Neuquén Basin - Argentina): Paleoeocological and paleoenvironmental implications

Autores
Caratelli, Martina; Archuby, Fernando; Pignatti, Johannes
Año de publicación
2020
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
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.
Fil: Caratelli, Martina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
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
Fil: Pignatti, Johannes. Università degli Studi di Roma "La Sapienza"; Italia
2nd Palaeontological Virtual Congress
Valencia
España
Palaeontological Virtual Congress
Materia
Encrusting foraminifers
Agua de la Mula Member
Neuquén Basin
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/202504
Acceder
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spelling Agglutinated encrusting foraminifers from the Agua de la Mula member (Agrio Formation, Neuquén Basin - Argentina): Paleoeocological and paleoenvironmental implicationsCaratelli, MartinaArchuby, FernandoPignatti, JohannesEncrusting foraminifersAgua de la Mula MemberNeuquén Basinhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1A 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.Fil: Caratelli, Martina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; ArgentinaFil: 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; ArgentinaFil: Pignatti, Johannes. Università degli Studi di Roma "La Sapienza"; Italia2nd Palaeontological Virtual CongressValenciaEspañaPalaeontological Virtual CongressPalaeontological Virtual Congress2020info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/202504Agglutinated 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; 122-122978-84-09-20283-6CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.uv.es/palaeovc/Documentos%20/2nd%20PVC/2nd_PVC_Book_of_Abstracts.pdfInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:24:09Zoai:ri.conicet.gov.ar:11336/202504instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:24:09.656CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Agglutinated encrusting foraminifers from the Agua de la Mula member (Agrio Formation, Neuquén Basin - Argentina): Paleoeocological and paleoenvironmental implications
title Agglutinated encrusting foraminifers from the Agua de la Mula member (Agrio Formation, Neuquén Basin - Argentina): Paleoeocological and paleoenvironmental implications
spellingShingle Agglutinated encrusting foraminifers from the Agua de la Mula member (Agrio Formation, Neuquén Basin - Argentina): Paleoeocological and paleoenvironmental implications
Caratelli, Martina
Encrusting foraminifers
Agua de la Mula Member
Neuquén Basin
title_short Agglutinated encrusting foraminifers from the Agua de la Mula member (Agrio Formation, Neuquén Basin - Argentina): Paleoeocological and paleoenvironmental implications
title_full Agglutinated encrusting foraminifers from the Agua de la Mula member (Agrio Formation, Neuquén Basin - Argentina): Paleoeocological and paleoenvironmental implications
title_fullStr Agglutinated encrusting foraminifers from the Agua de la Mula member (Agrio Formation, Neuquén Basin - Argentina): Paleoeocological and paleoenvironmental implications
title_full_unstemmed Agglutinated encrusting foraminifers from the Agua de la Mula member (Agrio Formation, Neuquén Basin - Argentina): Paleoeocological and paleoenvironmental implications
title_sort Agglutinated encrusting foraminifers from the Agua de la Mula member (Agrio Formation, Neuquén Basin - Argentina): Paleoeocological and paleoenvironmental implications
dc.creator.none.fl_str_mv Caratelli, Martina
Archuby, Fernando
Pignatti, Johannes
author Caratelli, Martina
author_facet Caratelli, Martina
Archuby, Fernando
Pignatti, Johannes
author_role author
author2 Archuby, Fernando
Pignatti, Johannes
author2_role author
author
dc.subject.none.fl_str_mv Encrusting foraminifers
Agua de la Mula Member
Neuquén Basin
topic Encrusting foraminifers
Agua de la Mula Member
Neuquén Basin
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv 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.
Fil: Caratelli, Martina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
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
Fil: Pignatti, Johannes. Università degli Studi di Roma "La Sapienza"; Italia
2nd Palaeontological Virtual Congress
Valencia
España
Palaeontological Virtual Congress
description 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.
publishDate 2020
dc.date.none.fl_str_mv 2020
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Congreso
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/202504
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
978-84-09-20283-6
CONICET Digital
CONICET
url http://hdl.handle.net/11336/202504
identifier_str_mv 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
978-84-09-20283-6
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.uv.es/palaeovc/Documentos%20/2nd%20PVC/2nd_PVC_Book_of_Abstracts.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Palaeontological Virtual Congress
publisher.none.fl_str_mv Palaeontological Virtual Congress
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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