High-precision late Aptian Pb/U age for the Punta del Barco Formation (Baqueró Group), Santa Cruz Province, Argentina

The Baqueró Group holds a rich fossil flora including macrofloristic and palynological remains that characterize the Early Cretaceous vegetation of Argentina. The age of the upper part of the Group, known as Punta del Barco Formation, has been a topic of several discussions in the past. The type loc...

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Autores principales: Césari, S.N., Limarino, C.O., Llorens, M., Passalia, M.G., Loinaze, V.P., Vera, E.I.
Formato: JOUR
Materias:
Aptian
Cretaceous
Geochronology
Paleobotany
Patagonia
age determination
geochronology
paleobotany
palynology
stratigraphy
uranium-lead dating
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08959811_v31_n4_p426_Cesari
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_08959811_v31_n4_p426_Cesari
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spelling todo:paper_08959811_v31_n4_p426_Cesari2023-10-03T15:42:59Z High-precision late Aptian Pb/U age for the Punta del Barco Formation (Baqueró Group), Santa Cruz Province, Argentina Césari, S.N. Limarino, C.O. Llorens, M. Passalia, M.G. Loinaze, V.P. Vera, E.I. Aptian Cretaceous Geochronology Paleobotany Patagonia age determination Aptian Cretaceous geochronology paleobotany palynology stratigraphy uranium-lead dating Patagonia The Baqueró Group holds a rich fossil flora including macrofloristic and palynological remains that characterize the Early Cretaceous vegetation of Argentina. The age of the upper part of the Group, known as Punta del Barco Formation, has been a topic of several discussions in the past. The type locality of this stratigraphic unit exposes fossiliferous tuffs together with muddy tuffs and tuffaceous sandstones beds. However, there have been no reliable age constraints for the fossil assemblages. 206Pb/238U analyses of zircon crystals yielded an age of 114.67 ± 0.18 Ma. This age control makes possible an improved analysis and comparison of the floras in the southern region. © 2011 Elsevier Ltd. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08959811_v31_n4_p426_Cesari
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Aptian
Cretaceous
Geochronology
Paleobotany
Patagonia
age determination
Aptian
Cretaceous
geochronology
paleobotany
palynology
stratigraphy
uranium-lead dating
Patagonia
spellingShingle Aptian
Cretaceous
Geochronology
Paleobotany
Patagonia
age determination
Aptian
Cretaceous
geochronology
paleobotany
palynology
stratigraphy
uranium-lead dating
Patagonia
Césari, S.N.
Limarino, C.O.
Llorens, M.
Passalia, M.G.
Loinaze, V.P.
Vera, E.I.
High-precision late Aptian Pb/U age for the Punta del Barco Formation (Baqueró Group), Santa Cruz Province, Argentina
topic_facet Aptian
Cretaceous
Geochronology
Paleobotany
Patagonia
age determination
Aptian
Cretaceous
geochronology
paleobotany
palynology
stratigraphy
uranium-lead dating
Patagonia
description The Baqueró Group holds a rich fossil flora including macrofloristic and palynological remains that characterize the Early Cretaceous vegetation of Argentina. The age of the upper part of the Group, known as Punta del Barco Formation, has been a topic of several discussions in the past. The type locality of this stratigraphic unit exposes fossiliferous tuffs together with muddy tuffs and tuffaceous sandstones beds. However, there have been no reliable age constraints for the fossil assemblages. 206Pb/238U analyses of zircon crystals yielded an age of 114.67 ± 0.18 Ma. This age control makes possible an improved analysis and comparison of the floras in the southern region. © 2011 Elsevier Ltd.
format JOUR
author Césari, S.N.
Limarino, C.O.
Llorens, M.
Passalia, M.G.
Loinaze, V.P.
Vera, E.I.
author_facet Césari, S.N.
Limarino, C.O.
Llorens, M.
Passalia, M.G.
Loinaze, V.P.
Vera, E.I.
author_sort Césari, S.N.
title High-precision late Aptian Pb/U age for the Punta del Barco Formation (Baqueró Group), Santa Cruz Province, Argentina
title_short High-precision late Aptian Pb/U age for the Punta del Barco Formation (Baqueró Group), Santa Cruz Province, Argentina
title_full High-precision late Aptian Pb/U age for the Punta del Barco Formation (Baqueró Group), Santa Cruz Province, Argentina
title_fullStr High-precision late Aptian Pb/U age for the Punta del Barco Formation (Baqueró Group), Santa Cruz Province, Argentina
title_full_unstemmed High-precision late Aptian Pb/U age for the Punta del Barco Formation (Baqueró Group), Santa Cruz Province, Argentina
title_sort high-precision late aptian pb/u age for the punta del barco formation (baqueró group), santa cruz province, argentina
url http://hdl.handle.net/20.500.12110/paper_08959811_v31_n4_p426_Cesari
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