Reworked mammal assemblage from the late Miocene of La Pampa Province, Argentina

Autores
Montalvo, Claudia Inés; Tomassini, Rodrigo Leandro; Cerdeño Serrano, Maria Esperanza
Año de publicación
2021
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Fossil-bearing levels of the Cerro Azul Formation, cropping out at Cerro La Bota (central La Pampa Province), are interpreted as amalgamated conglomeradic-sandy bodies, which suggest the episodic development of perennial streams without flow division on a loessic substrate. The mammal assemblage corresponds to the Chasicoan Stage/Age (late Miocene). Micromammal remains result from the leftover prey accumulated by predators in a den site, while macromammals result from an attritional accumulation of individuals inhabiting the area. Bones were buried in a loessic context and different pedogenetic processes acted on them. During the development of episodic streams, remains were reworked and incorporated into the fluvial channel. Reworking explains particularities of the assemblage: 1) size and shape of fossils suggest they were transported together with sedimentary particles after their primary burial; 2) a high percentage of remains with abrasion marks indicates that they were already fossilized when fluvial action modified them; 3) a high number of undetermined fragments with predominance of smooth transverse fractures; 4) predominance of elements with intermediate susceptibility to be transported, and a very high index of isolated teeth/vertebrae; and 5) relative abundance values reflecting an important loss of different skeletal elements. Even though the different primary accumulation could influence these results, we infer that mobilization and breakage generated during the fluvial reworking greatly affected the final anatomical representation. This study allows assigning the assemblage to the channel-lag taphonomic mode, and reinforces the importance of identifying reworking processes to achieve the complete taphonomic history and accurate biochronologic and biostratigraphic interpretations.
Fil: Montalvo, Claudia Inés. Universidad Nacional de la Pampa. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Naturales; Argentina
Fil: Tomassini, Rodrigo Leandro. Universidad Nacional del Sur. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
Fil: Cerdeño Serrano, Maria Esperanza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
34º Jornadas Argentinas de Paleontología de Vertebrados
Mendoza
Argentina
Asociación Paleontológica Argentina
Materia
TAPHONOMY
REWORKED ASSEMBLAGE
LATE MIOCENE
LA PAMPA PROVINCE
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:11336/211693
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Reworked mammal assemblage from the late Miocene of La Pampa Province, ArgentinaMontalvo, Claudia InésTomassini, Rodrigo LeandroCerdeño Serrano, Maria EsperanzaTAPHONOMYREWORKED ASSEMBLAGELATE MIOCENELA PAMPA PROVINCEhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Fossil-bearing levels of the Cerro Azul Formation, cropping out at Cerro La Bota (central La Pampa Province), are interpreted as amalgamated conglomeradic-sandy bodies, which suggest the episodic development of perennial streams without flow division on a loessic substrate. The mammal assemblage corresponds to the Chasicoan Stage/Age (late Miocene). Micromammal remains result from the leftover prey accumulated by predators in a den site, while macromammals result from an attritional accumulation of individuals inhabiting the area. Bones were buried in a loessic context and different pedogenetic processes acted on them. During the development of episodic streams, remains were reworked and incorporated into the fluvial channel. Reworking explains particularities of the assemblage: 1) size and shape of fossils suggest they were transported together with sedimentary particles after their primary burial; 2) a high percentage of remains with abrasion marks indicates that they were already fossilized when fluvial action modified them; 3) a high number of undetermined fragments with predominance of smooth transverse fractures; 4) predominance of elements with intermediate susceptibility to be transported, and a very high index of isolated teeth/vertebrae; and 5) relative abundance values reflecting an important loss of different skeletal elements. Even though the different primary accumulation could influence these results, we infer that mobilization and breakage generated during the fluvial reworking greatly affected the final anatomical representation. This study allows assigning the assemblage to the channel-lag taphonomic mode, and reinforces the importance of identifying reworking processes to achieve the complete taphonomic history and accurate biochronologic and biostratigraphic interpretations.Fil: Montalvo, Claudia Inés. Universidad Nacional de la Pampa. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Naturales; ArgentinaFil: Tomassini, Rodrigo Leandro. Universidad Nacional del Sur. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; ArgentinaFil: Cerdeño Serrano, Maria Esperanza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina34º Jornadas Argentinas de Paleontología de VertebradosMendozaArgentinaAsociación Paleontológica ArgentinaAsociación Paleontológica Argentina2021info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectJornadaBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/211693Reworked mammal assemblage from the late Miocene of La Pampa Province, Argentina; 34º Jornadas Argentinas de Paleontología de Vertebrados; Mendoza; Argentina; 2021; 32-322469-0228CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.5710/PEAPA.08.06.2021.394info:eu-repo/semantics/altIdentifier/url/https://www.peapaleontologica.org.ar/index.php/peapa/article/view/394Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:06:39Zoai:ri.conicet.gov.ar:11336/211693instacron: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:34982025-09-03 10:06:39.852CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Reworked mammal assemblage from the late Miocene of La Pampa Province, Argentina
title Reworked mammal assemblage from the late Miocene of La Pampa Province, Argentina
spellingShingle Reworked mammal assemblage from the late Miocene of La Pampa Province, Argentina
Montalvo, Claudia Inés
TAPHONOMY
REWORKED ASSEMBLAGE
LATE MIOCENE
LA PAMPA PROVINCE
title_short Reworked mammal assemblage from the late Miocene of La Pampa Province, Argentina
title_full Reworked mammal assemblage from the late Miocene of La Pampa Province, Argentina
title_fullStr Reworked mammal assemblage from the late Miocene of La Pampa Province, Argentina
title_full_unstemmed Reworked mammal assemblage from the late Miocene of La Pampa Province, Argentina
title_sort Reworked mammal assemblage from the late Miocene of La Pampa Province, Argentina
dc.creator.none.fl_str_mv Montalvo, Claudia Inés
Tomassini, Rodrigo Leandro
Cerdeño Serrano, Maria Esperanza
author Montalvo, Claudia Inés
author_facet Montalvo, Claudia Inés
Tomassini, Rodrigo Leandro
Cerdeño Serrano, Maria Esperanza
author_role author
author2 Tomassini, Rodrigo Leandro
Cerdeño Serrano, Maria Esperanza
author2_role author
author
dc.subject.none.fl_str_mv TAPHONOMY
REWORKED ASSEMBLAGE
LATE MIOCENE
LA PAMPA PROVINCE
topic TAPHONOMY
REWORKED ASSEMBLAGE
LATE MIOCENE
LA PAMPA PROVINCE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Fossil-bearing levels of the Cerro Azul Formation, cropping out at Cerro La Bota (central La Pampa Province), are interpreted as amalgamated conglomeradic-sandy bodies, which suggest the episodic development of perennial streams without flow division on a loessic substrate. The mammal assemblage corresponds to the Chasicoan Stage/Age (late Miocene). Micromammal remains result from the leftover prey accumulated by predators in a den site, while macromammals result from an attritional accumulation of individuals inhabiting the area. Bones were buried in a loessic context and different pedogenetic processes acted on them. During the development of episodic streams, remains were reworked and incorporated into the fluvial channel. Reworking explains particularities of the assemblage: 1) size and shape of fossils suggest they were transported together with sedimentary particles after their primary burial; 2) a high percentage of remains with abrasion marks indicates that they were already fossilized when fluvial action modified them; 3) a high number of undetermined fragments with predominance of smooth transverse fractures; 4) predominance of elements with intermediate susceptibility to be transported, and a very high index of isolated teeth/vertebrae; and 5) relative abundance values reflecting an important loss of different skeletal elements. Even though the different primary accumulation could influence these results, we infer that mobilization and breakage generated during the fluvial reworking greatly affected the final anatomical representation. This study allows assigning the assemblage to the channel-lag taphonomic mode, and reinforces the importance of identifying reworking processes to achieve the complete taphonomic history and accurate biochronologic and biostratigraphic interpretations.
Fil: Montalvo, Claudia Inés. Universidad Nacional de la Pampa. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Naturales; Argentina
Fil: Tomassini, Rodrigo Leandro. Universidad Nacional del Sur. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
Fil: Cerdeño Serrano, Maria Esperanza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
34º Jornadas Argentinas de Paleontología de Vertebrados
Mendoza
Argentina
Asociación Paleontológica Argentina
description Fossil-bearing levels of the Cerro Azul Formation, cropping out at Cerro La Bota (central La Pampa Province), are interpreted as amalgamated conglomeradic-sandy bodies, which suggest the episodic development of perennial streams without flow division on a loessic substrate. The mammal assemblage corresponds to the Chasicoan Stage/Age (late Miocene). Micromammal remains result from the leftover prey accumulated by predators in a den site, while macromammals result from an attritional accumulation of individuals inhabiting the area. Bones were buried in a loessic context and different pedogenetic processes acted on them. During the development of episodic streams, remains were reworked and incorporated into the fluvial channel. Reworking explains particularities of the assemblage: 1) size and shape of fossils suggest they were transported together with sedimentary particles after their primary burial; 2) a high percentage of remains with abrasion marks indicates that they were already fossilized when fluvial action modified them; 3) a high number of undetermined fragments with predominance of smooth transverse fractures; 4) predominance of elements with intermediate susceptibility to be transported, and a very high index of isolated teeth/vertebrae; and 5) relative abundance values reflecting an important loss of different skeletal elements. Even though the different primary accumulation could influence these results, we infer that mobilization and breakage generated during the fluvial reworking greatly affected the final anatomical representation. This study allows assigning the assemblage to the channel-lag taphonomic mode, and reinforces the importance of identifying reworking processes to achieve the complete taphonomic history and accurate biochronologic and biostratigraphic interpretations.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Jornada
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/11336/211693
Reworked mammal assemblage from the late Miocene of La Pampa Province, Argentina; 34º Jornadas Argentinas de Paleontología de Vertebrados; Mendoza; Argentina; 2021; 32-32
2469-0228
CONICET Digital
CONICET
url http://hdl.handle.net/11336/211693
identifier_str_mv Reworked mammal assemblage from the late Miocene of La Pampa Province, Argentina; 34º Jornadas Argentinas de Paleontología de Vertebrados; Mendoza; Argentina; 2021; 32-32
2469-0228
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.5710/PEAPA.08.06.2021.394
info:eu-repo/semantics/altIdentifier/url/https://www.peapaleontologica.org.ar/index.php/peapa/article/view/394
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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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 Nacional
dc.publisher.none.fl_str_mv Asociación Paleontológica Argentina
publisher.none.fl_str_mv Asociación Paleontológica Argentina
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
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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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