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dc.contributor.author
Alonso Muruaga, Pablo Joaquin
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dc.contributor.author
Krapovickas, Verónica
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dc.date.available
2024-08-15T10:08:11Z
dc.date.issued
2016
dc.identifier.citation
Exceptional preservation of Spaeraphus larvalis in the Miocene Vinchina Formation of western Argentina; 4th International Congress on Ichnology; Idanha-a-Nova; Portugal; 2016; 120-120
dc.identifier.isbn
978-989-97888-1-7
dc.identifier.uri
http://hdl.handle.net/11336/242529
dc.description.abstract
The Miocene Vinchina Formation of western Argentina is made up of more than 5100 meters of siliciclastic sediments deposited mostly in fluvial environments, including transitions from braided and meandering, to anastomosed systems. The Upper Member of the unit is characterized by the conspicuous occurrence of braided fluvial deposits, composed of heterolitic multistory channels, gravelly bars, sandy bars, and very thin intercalations of floodplain fines facies, hosting invertebrate and vertebrate trace-fossils assemblages. The present contribution deals with the outstanding preservation of Spaeraphus within these facies. In particular, the ichnofossils studied were recorded at the sole of a massive fine to very fine-grained sandstone bed interbedded with laminated claystones and siltstones, representing overbank sedimentation during flooding episodes. The trace Spaeraphus larvalis occurs as a positive or negative hyporelief. As positive epirelief is characterized by several horizontal burrows displaying raised, often imbricated, oval blocks generating nodular margins, and sometimes developing a discontinuous open medial depression. Occasionally, the medial depression is irregularly filled by smaller blocks. Individual blocks are smooth, subrounded to oval, 1? 4 mm in diameter, and identical in composition to the surrounding matrix. The burrow widths vary from 4 about 12 mm, and their courses are mostly straight with gentle curves with length of decimeter scale. Primary successive branching and intersecting of burrows are also seen. Ongoing research suggests that these traces reflect a shallow dwelling behavior in soft, fine grained substrates subaerially exposed but proximal to the water table as channel margins, interchannel areas, and marginal zones of local ponds.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
International Ichnological Association
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Trace fossils
dc.subject
Vinchina
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
Exceptional preservation of Spaeraphus larvalis in the Miocene Vinchina Formation of western Argentina
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
2024-07-26T13:37:55Z
dc.journal.pagination
120-120
dc.journal.pais
Portugal
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dc.journal.ciudad
Lisboa
dc.description.fil
Fil: Alonso Muruaga, Pablo Joaquin. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
dc.description.fil
Fil: Krapovickas, Verónica. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.palass.org/meetings-events/future-meetings/4th-international-congress-ichnology-ichnia-2016
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.naturtejo.com/ficheiros/conteudos/files/ichnia16livro.pdf
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
4th International Congress on Ichnology
dc.date.evento
2016-05-06
dc.description.ciudadEvento
Idanha-a-Nova
dc.description.paisEvento
Portugal
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dc.type.publicacion
Book
dc.description.institucionOrganizadora
International Ichnological Association
dc.source.libro
4th International Congress on Ichnology
dc.date.eventoHasta
2016-05-09
dc.type
Congreso
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