Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina
- Autores
- Iglesias, Ari; Luengo, Mariel Samanta; Zamuner, Alba Berta; Varela, Augusto Nicolás
- Año de publicación
- 2012
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- We described compression floras dominated by angiosperm in two Cretaceous formations in the area of the Tres Lagos town, Santa Cruz Province, Southern Patagonia. Four localities comprise a new flora at the highest levels of Piedra Clavada Formation (middle to upper Albian), which exhibit thirteen different leaf angiosperm forms of which only two are known in the overlying floras (middle Cenomanian) from Mata Amarilla Formation. Most leaf forms (MPM-PB) correspond to simple leaves of entire margin and pinnate venation with intramarginal veins and well developed drip-tips, follow in abundance by acrodromous and semicraspedodromous veined leaves, and palmatilobed forms. Associated to leaves there were found seeds, fruits, and flowers. The review of these floras and their recent certification of ages, state down that diversification and dominance of angiosperms occur very early in time at the Austral Basin. These data strengthen previous hypothesis based on palynofloras, establishing a floristic change characterized by a rapid diversification of angiosperms in the Albian. The new data suggest the need of a review of angiosperm evolutionary patterns in Patagonia with more precise geochronologic dates. During the Cenomanian, several floras of the world show the beginning and dominance of angiosperms in certain paleo-environments. But, it is evident that the flora of Piedra Clavada Formation is preserving a significant radiation of flowering plants that partly continue into the middle Cenomanian. The clues of this early radiation are unknown, but probably could be correlated with paleogeographic and paleoclimatic events at the middle Cretaceous and the angiosperm leaf photosynthetic capability.
Fil: Iglesias, Ari. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina
Fil: Luengo, Mariel Samanta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Geología Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Zamuner, Alba Berta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; 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
XV Simposio Argentino de Paleobotánica y Palinología y II Simposio Argentino de Melisopalinología
Corrientes
Argentina
Universidad Nacional del Nordeste - Materia
-
Early Angiosperms
Cretaceous environment
Austral Basin
Angiosperm dominated floras - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/232920
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Albian and Cenomanian angiosperm dominated floras from the Austral Basin, ArgentinaIglesias, AriLuengo, Mariel SamantaZamuner, Alba BertaVarela, Augusto NicolásEarly AngiospermsCretaceous environmentAustral BasinAngiosperm dominated florashttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1We described compression floras dominated by angiosperm in two Cretaceous formations in the area of the Tres Lagos town, Santa Cruz Province, Southern Patagonia. Four localities comprise a new flora at the highest levels of Piedra Clavada Formation (middle to upper Albian), which exhibit thirteen different leaf angiosperm forms of which only two are known in the overlying floras (middle Cenomanian) from Mata Amarilla Formation. Most leaf forms (MPM-PB) correspond to simple leaves of entire margin and pinnate venation with intramarginal veins and well developed drip-tips, follow in abundance by acrodromous and semicraspedodromous veined leaves, and palmatilobed forms. Associated to leaves there were found seeds, fruits, and flowers. The review of these floras and their recent certification of ages, state down that diversification and dominance of angiosperms occur very early in time at the Austral Basin. These data strengthen previous hypothesis based on palynofloras, establishing a floristic change characterized by a rapid diversification of angiosperms in the Albian. The new data suggest the need of a review of angiosperm evolutionary patterns in Patagonia with more precise geochronologic dates. During the Cenomanian, several floras of the world show the beginning and dominance of angiosperms in certain paleo-environments. But, it is evident that the flora of Piedra Clavada Formation is preserving a significant radiation of flowering plants that partly continue into the middle Cenomanian. The clues of this early radiation are unknown, but probably could be correlated with paleogeographic and paleoclimatic events at the middle Cretaceous and the angiosperm leaf photosynthetic capability.Fil: Iglesias, Ari. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; ArgentinaFil: Luengo, Mariel Samanta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Geología Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Zamuner, Alba Berta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; 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; ArgentinaXV Simposio Argentino de Paleobotánica y Palinología y II Simposio Argentino de MelisopalinologíaCorrientesArgentinaUniversidad Nacional del NordesteAsociación Paleontológica Argentina2012info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectSimposioJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/232920Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina; XV Simposio Argentino de Paleobotánica y Palinología y II Simposio Argentino de Melisopalinología; Corrientes; Argentina; 2012; 115-1151851-8044CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.ameghiniana.org.ar/index.php/ameghiniana/issue/view/58Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:39:33Zoai:ri.conicet.gov.ar:11336/232920instacron: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:34982025-10-15 14:39:34.05CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina |
title |
Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina |
spellingShingle |
Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina Iglesias, Ari Early Angiosperms Cretaceous environment Austral Basin Angiosperm dominated floras |
title_short |
Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina |
title_full |
Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina |
title_fullStr |
Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina |
title_full_unstemmed |
Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina |
title_sort |
Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina |
dc.creator.none.fl_str_mv |
Iglesias, Ari Luengo, Mariel Samanta Zamuner, Alba Berta Varela, Augusto Nicolás |
author |
Iglesias, Ari |
author_facet |
Iglesias, Ari Luengo, Mariel Samanta Zamuner, Alba Berta Varela, Augusto Nicolás |
author_role |
author |
author2 |
Luengo, Mariel Samanta Zamuner, Alba Berta Varela, Augusto Nicolás |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Early Angiosperms Cretaceous environment Austral Basin Angiosperm dominated floras |
topic |
Early Angiosperms Cretaceous environment Austral Basin Angiosperm dominated floras |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
We described compression floras dominated by angiosperm in two Cretaceous formations in the area of the Tres Lagos town, Santa Cruz Province, Southern Patagonia. Four localities comprise a new flora at the highest levels of Piedra Clavada Formation (middle to upper Albian), which exhibit thirteen different leaf angiosperm forms of which only two are known in the overlying floras (middle Cenomanian) from Mata Amarilla Formation. Most leaf forms (MPM-PB) correspond to simple leaves of entire margin and pinnate venation with intramarginal veins and well developed drip-tips, follow in abundance by acrodromous and semicraspedodromous veined leaves, and palmatilobed forms. Associated to leaves there were found seeds, fruits, and flowers. The review of these floras and their recent certification of ages, state down that diversification and dominance of angiosperms occur very early in time at the Austral Basin. These data strengthen previous hypothesis based on palynofloras, establishing a floristic change characterized by a rapid diversification of angiosperms in the Albian. The new data suggest the need of a review of angiosperm evolutionary patterns in Patagonia with more precise geochronologic dates. During the Cenomanian, several floras of the world show the beginning and dominance of angiosperms in certain paleo-environments. But, it is evident that the flora of Piedra Clavada Formation is preserving a significant radiation of flowering plants that partly continue into the middle Cenomanian. The clues of this early radiation are unknown, but probably could be correlated with paleogeographic and paleoclimatic events at the middle Cretaceous and the angiosperm leaf photosynthetic capability. Fil: Iglesias, Ari. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina Fil: Luengo, Mariel Samanta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Geología Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina Fil: Zamuner, Alba Berta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; 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 XV Simposio Argentino de Paleobotánica y Palinología y II Simposio Argentino de Melisopalinología Corrientes Argentina Universidad Nacional del Nordeste |
description |
We described compression floras dominated by angiosperm in two Cretaceous formations in the area of the Tres Lagos town, Santa Cruz Province, Southern Patagonia. Four localities comprise a new flora at the highest levels of Piedra Clavada Formation (middle to upper Albian), which exhibit thirteen different leaf angiosperm forms of which only two are known in the overlying floras (middle Cenomanian) from Mata Amarilla Formation. Most leaf forms (MPM-PB) correspond to simple leaves of entire margin and pinnate venation with intramarginal veins and well developed drip-tips, follow in abundance by acrodromous and semicraspedodromous veined leaves, and palmatilobed forms. Associated to leaves there were found seeds, fruits, and flowers. The review of these floras and their recent certification of ages, state down that diversification and dominance of angiosperms occur very early in time at the Austral Basin. These data strengthen previous hypothesis based on palynofloras, establishing a floristic change characterized by a rapid diversification of angiosperms in the Albian. The new data suggest the need of a review of angiosperm evolutionary patterns in Patagonia with more precise geochronologic dates. During the Cenomanian, several floras of the world show the beginning and dominance of angiosperms in certain paleo-environments. But, it is evident that the flora of Piedra Clavada Formation is preserving a significant radiation of flowering plants that partly continue into the middle Cenomanian. The clues of this early radiation are unknown, but probably could be correlated with paleogeographic and paleoclimatic events at the middle Cretaceous and the angiosperm leaf photosynthetic capability. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/conferenceObject Simposio Journal 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/11336/232920 Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina; XV Simposio Argentino de Paleobotánica y Palinología y II Simposio Argentino de Melisopalinología; Corrientes; Argentina; 2012; 115-115 1851-8044 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/232920 |
identifier_str_mv |
Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina; XV Simposio Argentino de Paleobotánica y Palinología y II Simposio Argentino de Melisopalinología; Corrientes; Argentina; 2012; 115-115 1851-8044 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.ameghiniana.org.ar/index.php/ameghiniana/issue/view/58 |
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info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
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https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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application/pdf application/pdf application/pdf application/pdf |
dc.coverage.none.fl_str_mv |
Nacional |
dc.publisher.none.fl_str_mv |
Asociación Paleontológica Argentina |
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Asociación Paleontológica Argentina |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.22299 |