Ichnology and Sedimentology of Estuarine deposits from Mata Amarilla Formation, Austral Basin, Argentina

Autores
Richiano, Sebastián Miguel; Varela, Augusto Nicolás; Cereceda, Abril; Poire, Daniel Gustavo
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Mata Amarilla Formation is part of the infilling of the Austral Basin, located in Southern Patagonia, Argentina. This unit is mainly composed of grey to black mudstones interbedded with white fine- to coarse-grained sandstones, deposited in littoral and continental environments. The unit has been dated between the lower Cenomanian to the Santonian and has been divided into three informal sections: lower (littoral), middle (continental) and upper (littoral). The lower and upper sections constitute the main object of this study and they are interpreted as estuary, bay-head delta and coastal lagoon deposits. The intervals contain Arenicolites, Chondrites, Cylindrichnus, Ophiomorpha, Palaeophycus, Skolithos, Thalassinoides, Teredolites and fugichnia. The sedimentological and ichnological analyses allowed the interpretation of an overall estuarine palaeoenvironment, which is composed of three facies associations (FA) characterized by discrete associations of trace fossils. The more proximal FA is the bay-head delta, comprising delta-front bars of coarse-grained sandstone, containing Arenicolites, Skolithos and allochthonous petrified wood containing Teredolites. The trace fossils recorded in this FA indicate high-energy conditions. The second unit is interpreted as estuarine bars. This second FA is composed of fine- to medium-grained sandstone containing herringbone cross-stratification and mud drapes with Cylindrichnus, Ophiomorpha nodosa, Skolithos, Thalassinoides and fugichnia. This reflects a setting with a high sedimentation rates, moderate energy, unstable substrates, and normal salinity. Finally, the fine-grained estuarine deposits are characterized by heterolithic composite bedsets (e.g., flaser, wavy and lenticular bedding), locally with synaeresis cracks. Such units are bioturbated with Arenicolites, Chondrites, Cylindrichnus, Palaeophycus, Thalassinoides and Skolithos. These ichnogenera are generally characterized by their small sizes, consistent with a stressed palaeoenvironment, possibly a function of fluctuations in salinity. The distribution, size and abundance of the trace fossils were controlled by several palaeoenvironmental factors including energy, the sedimentation rate, and the fluctuations of salinity contents. This variability of palaeoenvironmental factors is directly related to the fresh water and sediment input from rivers flood, which took place during the wet seasons of a warm, temperate climate.
Fil: Richiano, Sebastián Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Varela, Augusto Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Cereceda, Abril. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Poire, Daniel Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Materia
Trace Fossils
Estuarine Deposits
Mata Amarilla Formation
Cretaceous
Austral 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:11336/32416
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/32416
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Ichnology and Sedimentology of Estuarine deposits from Mata Amarilla Formation, Austral Basin, ArgentinaRichiano, Sebastián MiguelVarela, Augusto NicolásCereceda, AbrilPoire, Daniel GustavoTrace FossilsEstuarine DepositsMata Amarilla FormationCretaceousAustral Basinhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Mata Amarilla Formation is part of the infilling of the Austral Basin, located in Southern Patagonia, Argentina. This unit is mainly composed of grey to black mudstones interbedded with white fine- to coarse-grained sandstones, deposited in littoral and continental environments. The unit has been dated between the lower Cenomanian to the Santonian and has been divided into three informal sections: lower (littoral), middle (continental) and upper (littoral). The lower and upper sections constitute the main object of this study and they are interpreted as estuary, bay-head delta and coastal lagoon deposits. The intervals contain Arenicolites, Chondrites, Cylindrichnus, Ophiomorpha, Palaeophycus, Skolithos, Thalassinoides, Teredolites and fugichnia. The sedimentological and ichnological analyses allowed the interpretation of an overall estuarine palaeoenvironment, which is composed of three facies associations (FA) characterized by discrete associations of trace fossils. The more proximal FA is the bay-head delta, comprising delta-front bars of coarse-grained sandstone, containing Arenicolites, Skolithos and allochthonous petrified wood containing Teredolites. The trace fossils recorded in this FA indicate high-energy conditions. The second unit is interpreted as estuarine bars. This second FA is composed of fine- to medium-grained sandstone containing herringbone cross-stratification and mud drapes with Cylindrichnus, Ophiomorpha nodosa, Skolithos, Thalassinoides and fugichnia. This reflects a setting with a high sedimentation rates, moderate energy, unstable substrates, and normal salinity. Finally, the fine-grained estuarine deposits are characterized by heterolithic composite bedsets (e.g., flaser, wavy and lenticular bedding), locally with synaeresis cracks. Such units are bioturbated with Arenicolites, Chondrites, Cylindrichnus, Palaeophycus, Thalassinoides and Skolithos. These ichnogenera are generally characterized by their small sizes, consistent with a stressed palaeoenvironment, possibly a function of fluctuations in salinity. The distribution, size and abundance of the trace fossils were controlled by several palaeoenvironmental factors including energy, the sedimentation rate, and the fluctuations of salinity contents. This variability of palaeoenvironmental factors is directly related to the fresh water and sediment input from rivers flood, which took place during the wet seasons of a warm, temperate climate.Fil: Richiano, Sebastián Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Varela, Augusto Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Cereceda, Abril. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Poire, Daniel Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaSociedad Española de Paleontología2014-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/32416Richiano, Sebastián Miguel; Varela, Augusto Nicolás; Cereceda, Abril; Poire, Daniel Gustavo; Ichnology and Sedimentology of Estuarine deposits from Mata Amarilla Formation, Austral Basin, Argentina; Sociedad Española de Paleontología; Spanish Journal of Palaeontology; 29; 2; 2-2014; 117-1302255-0550CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sepaleontologia.es/revista/anteriores/REP%20%282013%29%20vol.%2029/2/01.%20Richiardo%20et%20al.pdfinfo:eu-repo/semantics/altIdentifier/url/http://sepaleontologia.es/sjp-2014-vol-29-no-2/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:03:06Zoai:ri.conicet.gov.ar:11336/32416instacron: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 10:03:06.884CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Ichnology and Sedimentology of Estuarine deposits from Mata Amarilla Formation, Austral Basin, Argentina
title Ichnology and Sedimentology of Estuarine deposits from Mata Amarilla Formation, Austral Basin, Argentina
spellingShingle Ichnology and Sedimentology of Estuarine deposits from Mata Amarilla Formation, Austral Basin, Argentina
Richiano, Sebastián Miguel
Trace Fossils
Estuarine Deposits
Mata Amarilla Formation
Cretaceous
Austral Basin
title_short Ichnology and Sedimentology of Estuarine deposits from Mata Amarilla Formation, Austral Basin, Argentina
title_full Ichnology and Sedimentology of Estuarine deposits from Mata Amarilla Formation, Austral Basin, Argentina
title_fullStr Ichnology and Sedimentology of Estuarine deposits from Mata Amarilla Formation, Austral Basin, Argentina
title_full_unstemmed Ichnology and Sedimentology of Estuarine deposits from Mata Amarilla Formation, Austral Basin, Argentina
title_sort Ichnology and Sedimentology of Estuarine deposits from Mata Amarilla Formation, Austral Basin, Argentina
dc.creator.none.fl_str_mv Richiano, Sebastián Miguel
Varela, Augusto Nicolás
Cereceda, Abril
Poire, Daniel Gustavo
author Richiano, Sebastián Miguel
author_facet Richiano, Sebastián Miguel
Varela, Augusto Nicolás
Cereceda, Abril
Poire, Daniel Gustavo
author_role author
author2 Varela, Augusto Nicolás
Cereceda, Abril
Poire, Daniel Gustavo
author2_role author
author
author
dc.subject.none.fl_str_mv Trace Fossils
Estuarine Deposits
Mata Amarilla Formation
Cretaceous
Austral Basin
topic Trace Fossils
Estuarine Deposits
Mata Amarilla Formation
Cretaceous
Austral 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 The Mata Amarilla Formation is part of the infilling of the Austral Basin, located in Southern Patagonia, Argentina. This unit is mainly composed of grey to black mudstones interbedded with white fine- to coarse-grained sandstones, deposited in littoral and continental environments. The unit has been dated between the lower Cenomanian to the Santonian and has been divided into three informal sections: lower (littoral), middle (continental) and upper (littoral). The lower and upper sections constitute the main object of this study and they are interpreted as estuary, bay-head delta and coastal lagoon deposits. The intervals contain Arenicolites, Chondrites, Cylindrichnus, Ophiomorpha, Palaeophycus, Skolithos, Thalassinoides, Teredolites and fugichnia. The sedimentological and ichnological analyses allowed the interpretation of an overall estuarine palaeoenvironment, which is composed of three facies associations (FA) characterized by discrete associations of trace fossils. The more proximal FA is the bay-head delta, comprising delta-front bars of coarse-grained sandstone, containing Arenicolites, Skolithos and allochthonous petrified wood containing Teredolites. The trace fossils recorded in this FA indicate high-energy conditions. The second unit is interpreted as estuarine bars. This second FA is composed of fine- to medium-grained sandstone containing herringbone cross-stratification and mud drapes with Cylindrichnus, Ophiomorpha nodosa, Skolithos, Thalassinoides and fugichnia. This reflects a setting with a high sedimentation rates, moderate energy, unstable substrates, and normal salinity. Finally, the fine-grained estuarine deposits are characterized by heterolithic composite bedsets (e.g., flaser, wavy and lenticular bedding), locally with synaeresis cracks. Such units are bioturbated with Arenicolites, Chondrites, Cylindrichnus, Palaeophycus, Thalassinoides and Skolithos. These ichnogenera are generally characterized by their small sizes, consistent with a stressed palaeoenvironment, possibly a function of fluctuations in salinity. The distribution, size and abundance of the trace fossils were controlled by several palaeoenvironmental factors including energy, the sedimentation rate, and the fluctuations of salinity contents. This variability of palaeoenvironmental factors is directly related to the fresh water and sediment input from rivers flood, which took place during the wet seasons of a warm, temperate climate.
Fil: Richiano, Sebastián Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Varela, Augusto Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Cereceda, Abril. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Poire, Daniel Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
description The Mata Amarilla Formation is part of the infilling of the Austral Basin, located in Southern Patagonia, Argentina. This unit is mainly composed of grey to black mudstones interbedded with white fine- to coarse-grained sandstones, deposited in littoral and continental environments. The unit has been dated between the lower Cenomanian to the Santonian and has been divided into three informal sections: lower (littoral), middle (continental) and upper (littoral). The lower and upper sections constitute the main object of this study and they are interpreted as estuary, bay-head delta and coastal lagoon deposits. The intervals contain Arenicolites, Chondrites, Cylindrichnus, Ophiomorpha, Palaeophycus, Skolithos, Thalassinoides, Teredolites and fugichnia. The sedimentological and ichnological analyses allowed the interpretation of an overall estuarine palaeoenvironment, which is composed of three facies associations (FA) characterized by discrete associations of trace fossils. The more proximal FA is the bay-head delta, comprising delta-front bars of coarse-grained sandstone, containing Arenicolites, Skolithos and allochthonous petrified wood containing Teredolites. The trace fossils recorded in this FA indicate high-energy conditions. The second unit is interpreted as estuarine bars. This second FA is composed of fine- to medium-grained sandstone containing herringbone cross-stratification and mud drapes with Cylindrichnus, Ophiomorpha nodosa, Skolithos, Thalassinoides and fugichnia. This reflects a setting with a high sedimentation rates, moderate energy, unstable substrates, and normal salinity. Finally, the fine-grained estuarine deposits are characterized by heterolithic composite bedsets (e.g., flaser, wavy and lenticular bedding), locally with synaeresis cracks. Such units are bioturbated with Arenicolites, Chondrites, Cylindrichnus, Palaeophycus, Thalassinoides and Skolithos. These ichnogenera are generally characterized by their small sizes, consistent with a stressed palaeoenvironment, possibly a function of fluctuations in salinity. The distribution, size and abundance of the trace fossils were controlled by several palaeoenvironmental factors including energy, the sedimentation rate, and the fluctuations of salinity contents. This variability of palaeoenvironmental factors is directly related to the fresh water and sediment input from rivers flood, which took place during the wet seasons of a warm, temperate climate.
publishDate 2014
dc.date.none.fl_str_mv 2014-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/32416
Richiano, Sebastián Miguel; Varela, Augusto Nicolás; Cereceda, Abril; Poire, Daniel Gustavo; Ichnology and Sedimentology of Estuarine deposits from Mata Amarilla Formation, Austral Basin, Argentina; Sociedad Española de Paleontología; Spanish Journal of Palaeontology; 29; 2; 2-2014; 117-130
2255-0550
CONICET Digital
CONICET
url http://hdl.handle.net/11336/32416
identifier_str_mv Richiano, Sebastián Miguel; Varela, Augusto Nicolás; Cereceda, Abril; Poire, Daniel Gustavo; Ichnology and Sedimentology of Estuarine deposits from Mata Amarilla Formation, Austral Basin, Argentina; Sociedad Española de Paleontología; Spanish Journal of Palaeontology; 29; 2; 2-2014; 117-130
2255-0550
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sepaleontologia.es/revista/anteriores/REP%20%282013%29%20vol.%2029/2/01.%20Richiardo%20et%20al.pdf
info:eu-repo/semantics/altIdentifier/url/http://sepaleontologia.es/sjp-2014-vol-29-no-2/
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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Sociedad Española de Paleontología
publisher.none.fl_str_mv Sociedad Española de Paleontología
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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