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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2011
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v31_n4_p426_Cesari http://hdl.handle.net/20.500.12110/paper_08959811_v31_n4_p426_Cesari |
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paper:paper_08959811_v31_n4_p426_Cesari2023-06-08T15:48:34Z High-precision late Aptian Pb/U age for the Punta del Barco Formation (Baqueró Group), Santa Cruz Province, Argentina 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. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v31_n4_p426_Cesari 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 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. |
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 |
publishDate |
2011 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v31_n4_p426_Cesari http://hdl.handle.net/20.500.12110/paper_08959811_v31_n4_p426_Cesari |
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1768544555990253568 |