Characterization of a heterogeneous sequence boundary surface perpendicular to the Patagonian fold-and-thrust belt: the role of fossil forest

Autores
Varela, Augusto Nicolás; Richiano, Sebastián Miguel; Poire, Daniel Gustavo; Iglesias, Ari; Brea, Mariana
Año de publicación
2017
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The mid-Cretaceous Mata Amarilla Formation marks the onset of the foreland stage of the Austral/ Magallanes Basin (southern Patagonia Argentina), which is related to the first stage of growth of the Andes. It is composed of three informal sections which were deposited in littoral and continental environments. The boundary between the lower and middle sections of the Mata Amarilla Formation shows a drastic reduction in accommodation/sediment supply (A/S) ratio, interpreted as a sequence boundary surface. This surface is characterized by a well-developed palaeosol, associated with the extensive preservation of a podocarpdominated fossil forest over a vast area (more than 5400 km). Sedimentological and palaeopedological analyses, in conjunction with forest structure, tree density and growth ring analyses, indicate that the midCenomanian sequence boundary can be distinguished as a non-uniform regional surface developed over a short period of time. In a west-east transect perpendicular to the Patagonian fold-and-trust belt, this heterogeneous surface is delimited in the western part by an erosional surface generated by a large lateral channel migration recorded by sheetlike channel deposits with transported logs. By comparison, towards the eastern part of the study area, it appears as a paraconformity bounded by a very mature vertic Alfisol, which may have taken 40–100 ky to develop, and the preservation of a fossil forest in life position with a minimum age of 337 years. On the other hand, in a north-south transect parallel to the Patagonian fold-and-trust belt, this surface is interpreted as a forced regression surface because towards the basin depocenter overlies shallow marine deposit of the lower section of the Mata Amarilla Formation. However, this interpretation is not so clear in the west-east transect towards the basin margins where this surface overlies distal fluvial and littoral deposits of the lower section of the Mata Amarilla Formation. It is concluded that the extensive presence of these fossil forests at the same stratigraphic level in a vast region respond to changes in A/S ratio in a forced regressive surface at basin scale.
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: Richiano, Sebastián Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; 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
Fil: Iglesias, Ari. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Brea, Mariana. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; Argentina
33rd International Meeting of Sedimentology. 16ème Congrès Français de Sèdimentologie
Toulouse
Francia
International Association of Sedimentologists
Materia
Sequence boundary surface
Patagonian fold-and thrust belt
Sedimentology
Papaleopedology
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:11336/215630
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Characterization of a heterogeneous sequence boundary surface perpendicular to the Patagonian fold-and-thrust belt: the role of fossil forestVarela, Augusto NicolásRichiano, Sebastián MiguelPoire, Daniel GustavoIglesias, AriBrea, MarianaSequence boundary surfacePatagonian fold-and thrust beltSedimentologyPapaleopedologyhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The mid-Cretaceous Mata Amarilla Formation marks the onset of the foreland stage of the Austral/ Magallanes Basin (southern Patagonia Argentina), which is related to the first stage of growth of the Andes. It is composed of three informal sections which were deposited in littoral and continental environments. The boundary between the lower and middle sections of the Mata Amarilla Formation shows a drastic reduction in accommodation/sediment supply (A/S) ratio, interpreted as a sequence boundary surface. This surface is characterized by a well-developed palaeosol, associated with the extensive preservation of a podocarpdominated fossil forest over a vast area (more than 5400 km). Sedimentological and palaeopedological analyses, in conjunction with forest structure, tree density and growth ring analyses, indicate that the midCenomanian sequence boundary can be distinguished as a non-uniform regional surface developed over a short period of time. In a west-east transect perpendicular to the Patagonian fold-and-trust belt, this heterogeneous surface is delimited in the western part by an erosional surface generated by a large lateral channel migration recorded by sheetlike channel deposits with transported logs. By comparison, towards the eastern part of the study area, it appears as a paraconformity bounded by a very mature vertic Alfisol, which may have taken 40–100 ky to develop, and the preservation of a fossil forest in life position with a minimum age of 337 years. On the other hand, in a north-south transect parallel to the Patagonian fold-and-trust belt, this surface is interpreted as a forced regression surface because towards the basin depocenter overlies shallow marine deposit of the lower section of the Mata Amarilla Formation. However, this interpretation is not so clear in the west-east transect towards the basin margins where this surface overlies distal fluvial and littoral deposits of the lower section of the Mata Amarilla Formation. It is concluded that the extensive presence of these fossil forests at the same stratigraphic level in a vast region respond to changes in A/S ratio in a forced regressive surface at basin scale.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; ArgentinaFil: Richiano, Sebastián Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; 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; ArgentinaFil: Iglesias, Ari. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Brea, Mariana. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; Argentina33rd International Meeting of Sedimentology. 16ème Congrès Français de SèdimentologieToulouseFranciaInternational Association of SedimentologistsInternational Association of Sedimentologists2017info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/215630Characterization of a heterogeneous sequence boundary surface perpendicular to the Patagonian fold-and-thrust belt: the role of fossil forest; 33rd International Meeting of Sedimentology. 16ème Congrès Français de Sèdimentologie; Toulouse; Francia; 2017; 915-9152-907205-78-10990-3925CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sedimentologists.org/imsinfo:eu-repo/semantics/altIdentifier/url/https://ims2017.sciencesconf.org/data/IMS_2017_Abstracts_book.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 Técnicas2025-09-10T13:07:01Zoai:ri.conicet.gov.ar:11336/215630instacron: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:34982025-09-10 13:07:01.745CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Characterization of a heterogeneous sequence boundary surface perpendicular to the Patagonian fold-and-thrust belt: the role of fossil forest
title Characterization of a heterogeneous sequence boundary surface perpendicular to the Patagonian fold-and-thrust belt: the role of fossil forest
spellingShingle Characterization of a heterogeneous sequence boundary surface perpendicular to the Patagonian fold-and-thrust belt: the role of fossil forest
Varela, Augusto Nicolás
Sequence boundary surface
Patagonian fold-and thrust belt
Sedimentology
Papaleopedology
title_short Characterization of a heterogeneous sequence boundary surface perpendicular to the Patagonian fold-and-thrust belt: the role of fossil forest
title_full Characterization of a heterogeneous sequence boundary surface perpendicular to the Patagonian fold-and-thrust belt: the role of fossil forest
title_fullStr Characterization of a heterogeneous sequence boundary surface perpendicular to the Patagonian fold-and-thrust belt: the role of fossil forest
title_full_unstemmed Characterization of a heterogeneous sequence boundary surface perpendicular to the Patagonian fold-and-thrust belt: the role of fossil forest
title_sort Characterization of a heterogeneous sequence boundary surface perpendicular to the Patagonian fold-and-thrust belt: the role of fossil forest
dc.creator.none.fl_str_mv Varela, Augusto Nicolás
Richiano, Sebastián Miguel
Poire, Daniel Gustavo
Iglesias, Ari
Brea, Mariana
author Varela, Augusto Nicolás
author_facet Varela, Augusto Nicolás
Richiano, Sebastián Miguel
Poire, Daniel Gustavo
Iglesias, Ari
Brea, Mariana
author_role author
author2 Richiano, Sebastián Miguel
Poire, Daniel Gustavo
Iglesias, Ari
Brea, Mariana
author2_role author
author
author
author
dc.subject.none.fl_str_mv Sequence boundary surface
Patagonian fold-and thrust belt
Sedimentology
Papaleopedology
topic Sequence boundary surface
Patagonian fold-and thrust belt
Sedimentology
Papaleopedology
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 mid-Cretaceous Mata Amarilla Formation marks the onset of the foreland stage of the Austral/ Magallanes Basin (southern Patagonia Argentina), which is related to the first stage of growth of the Andes. It is composed of three informal sections which were deposited in littoral and continental environments. The boundary between the lower and middle sections of the Mata Amarilla Formation shows a drastic reduction in accommodation/sediment supply (A/S) ratio, interpreted as a sequence boundary surface. This surface is characterized by a well-developed palaeosol, associated with the extensive preservation of a podocarpdominated fossil forest over a vast area (more than 5400 km). Sedimentological and palaeopedological analyses, in conjunction with forest structure, tree density and growth ring analyses, indicate that the midCenomanian sequence boundary can be distinguished as a non-uniform regional surface developed over a short period of time. In a west-east transect perpendicular to the Patagonian fold-and-trust belt, this heterogeneous surface is delimited in the western part by an erosional surface generated by a large lateral channel migration recorded by sheetlike channel deposits with transported logs. By comparison, towards the eastern part of the study area, it appears as a paraconformity bounded by a very mature vertic Alfisol, which may have taken 40–100 ky to develop, and the preservation of a fossil forest in life position with a minimum age of 337 years. On the other hand, in a north-south transect parallel to the Patagonian fold-and-trust belt, this surface is interpreted as a forced regression surface because towards the basin depocenter overlies shallow marine deposit of the lower section of the Mata Amarilla Formation. However, this interpretation is not so clear in the west-east transect towards the basin margins where this surface overlies distal fluvial and littoral deposits of the lower section of the Mata Amarilla Formation. It is concluded that the extensive presence of these fossil forests at the same stratigraphic level in a vast region respond to changes in A/S ratio in a forced regressive surface at basin scale.
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: Richiano, Sebastián Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; 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
Fil: Iglesias, Ari. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Brea, Mariana. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; Argentina
33rd International Meeting of Sedimentology. 16ème Congrès Français de Sèdimentologie
Toulouse
Francia
International Association of Sedimentologists
description The mid-Cretaceous Mata Amarilla Formation marks the onset of the foreland stage of the Austral/ Magallanes Basin (southern Patagonia Argentina), which is related to the first stage of growth of the Andes. It is composed of three informal sections which were deposited in littoral and continental environments. The boundary between the lower and middle sections of the Mata Amarilla Formation shows a drastic reduction in accommodation/sediment supply (A/S) ratio, interpreted as a sequence boundary surface. This surface is characterized by a well-developed palaeosol, associated with the extensive preservation of a podocarpdominated fossil forest over a vast area (more than 5400 km). Sedimentological and palaeopedological analyses, in conjunction with forest structure, tree density and growth ring analyses, indicate that the midCenomanian sequence boundary can be distinguished as a non-uniform regional surface developed over a short period of time. In a west-east transect perpendicular to the Patagonian fold-and-trust belt, this heterogeneous surface is delimited in the western part by an erosional surface generated by a large lateral channel migration recorded by sheetlike channel deposits with transported logs. By comparison, towards the eastern part of the study area, it appears as a paraconformity bounded by a very mature vertic Alfisol, which may have taken 40–100 ky to develop, and the preservation of a fossil forest in life position with a minimum age of 337 years. On the other hand, in a north-south transect parallel to the Patagonian fold-and-trust belt, this surface is interpreted as a forced regression surface because towards the basin depocenter overlies shallow marine deposit of the lower section of the Mata Amarilla Formation. However, this interpretation is not so clear in the west-east transect towards the basin margins where this surface overlies distal fluvial and littoral deposits of the lower section of the Mata Amarilla Formation. It is concluded that the extensive presence of these fossil forests at the same stratigraphic level in a vast region respond to changes in A/S ratio in a forced regressive surface at basin scale.
publishDate 2017
dc.date.none.fl_str_mv 2017
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/11336/215630
Characterization of a heterogeneous sequence boundary surface perpendicular to the Patagonian fold-and-thrust belt: the role of fossil forest; 33rd International Meeting of Sedimentology. 16ème Congrès Français de Sèdimentologie; Toulouse; Francia; 2017; 915-915
2-907205-78-1
0990-3925
CONICET Digital
CONICET
url http://hdl.handle.net/11336/215630
identifier_str_mv Characterization of a heterogeneous sequence boundary surface perpendicular to the Patagonian fold-and-thrust belt: the role of fossil forest; 33rd International Meeting of Sedimentology. 16ème Congrès Français de Sèdimentologie; Toulouse; Francia; 2017; 915-915
2-907205-78-1
0990-3925
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.sedimentologists.org/ims
info:eu-repo/semantics/altIdentifier/url/https://ims2017.sciencesconf.org/data/IMS_2017_Abstracts_book.pdf
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
application/pdf
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv International Association of Sedimentologists
publisher.none.fl_str_mv International Association of Sedimentologists
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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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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