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dc.contributor.author
Rodríguez, Debora L.
dc.contributor.author
Pazos, Pablo Jose
dc.contributor.author
Aguirre-Urreta, Maria Beatriz
dc.contributor.other
Bromley, Richard G.
dc.contributor.other
Buatois, Luis Alberto
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Mangano, Maria Gabriela
dc.contributor.other
Genise, Jorge Fernando
dc.contributor.other
Melchor, Richard N.
dc.date.available
2020-05-28T17:48:32Z
dc.date.issued
2007
dc.identifier.citation
Rodríguez, Debora L.; Pazos, Pablo Jose; Aguirre-Urreta, Maria Beatriz; Cretaceous ophiuropod trace fossils from the Neuquén Basin, Argentina; Society for Sedimentary Geology; 88; 2007; 97-105
dc.identifier.isbn
978-1-56576-129-2
dc.identifier.uri
http://hdl.handle.net/11336/106159
dc.description.abstract
This paper reports the facies analysis and ichnology of a logged section in the lower part of the Mulichinco Formation (Early Valanginian), at Vega de Escalone in the Neuquén Basin, western Argentina. Four Facies Associations have been defined (A-D) and they record deposition below the storm wave base (A), mainly as gravitational flow deposits (coquinas) devoid of any evidence of bioturbation. Hummocky cross stratification, wave, and current ripples and mud intervals record the offshore transition (B). Wave and current ripples, and heterolithic stratification record the shoreface (C) and a shallowing upward trend. The uppermost part of the succession exhibits tidal influence (D). Trace fossils documented in the shoreface (C) include abundant Asteriacites lumbricalis, Lockeia isp, Gyrochorte comosa, Planolites isp. and fugichnial trace fossils that indicate a stressed environment affected by changes in sedimentation rate and probably salinity. In heterolithic ripple troughs, abundant Asteriacites lumbricalis are well preserved, protected by mud drapes and they include evidence of horizontal displacement and vertical superposition. Lockeia and Planolites intersect Asteriacites, and Gyrochorte comosa is a facies-crossing trace fossil. Trace fossils in the tidally influenced interval (D) are restricted in diversity and distribution. Some bedding planes contain monospecific assemblages of Asteriacites lumbricalis, others contain J-shape burrows and Gyrochorte comosa. Trace fossils may be assigned to the Cruziana ichnofacies while vertical burrows in hummocky cross stratification are interpreted as records of the Skolithos ichnofacies. This apparent inversion in the trace fossils distribution according to the marine ichnofacies may be a response to the change from an opportunistic to a background fauna.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Society for Sedimentary Geology
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ichnology
dc.subject
facies
dc.subject
Cretaceous
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NeuquenBasin
dc.subject.classification
Geología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Cretaceous ophiuropod trace fossils from the Neuquén Basin, Argentina
dc.type
info:eu-repo/semantics/publishedVersion
dc.type
info:eu-repo/semantics/bookPart
dc.type
info:ar-repo/semantics/parte de libro
dc.date.updated
2020-05-04T16:04:38Z
dc.journal.volume
88
dc.journal.pagination
97-105
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Rodríguez, Debora L.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología; Argentina
dc.description.fil
Fil: Pazos, Pablo Jose. 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.description.fil
Fil: Aguirre-Urreta, Maria Beatriz. 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/doi/http://dx.doi.org/10.2110/pec.07.88.0097
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/books/book/1190/chapter/10710832/Cretaceous-Ophiuroid-Trace-Fossils-from-the
dc.conicet.paginas
389
dc.source.titulo
Sediment-Organism Interactions : A Multifaceted Ichnology
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