Journal ArticleDOI
Revised stratigraphic framework of the Cretaceous in the Bajo Grande area (Argentinean Patagonia) inferred from new U–Pb ages and palynology
Mauro Gabriel Passalia,Magdalena Llorens,Magdalena Llorens,Silvia N. Césari,Carlos Oscar Limarino,Carlos Oscar Limarino,Valeria Susana Perez Loinaze,Ezequiel Ignacio Vera,Ezequiel Ignacio Vera +8 more
TLDR
In this article, the Baquero flora was used to date the earliest stage in angiosperm diversification in southern Gondwana, in the Bajo Grande area (Argentinean Patagonia).About:
This article is published in Cretaceous Research.The article was published on 2016-05-01. It has received 22 citations till now. The article focuses on the topics: Aptian.read more
Citations
More filters
Journal ArticleDOI
Eobowenia gen. nov. from the Early Cretaceous of Patagonia: indication for an early divergence of Bowenia?
Mario Coiro,Christian Pott +1 more
TL;DR: Fossil foliage Almargemia incrassata from the Lower Cretaceous Anfiteatro de Ticó Formation in Patagonia, Argentina is re-examine in the light of a comparative cuticular analysis of extant Zamiaceae, and phylogenetic analyses indicate that a newly erected genus could be related to extant Bowenia.
Journal ArticleDOI
Cretaceous Intraplate Contraction in Southern Patagonia: A Far-Field Response to Changing Subduction Dynamics?
Guido M. Gianni,César Navarrete,I. Liendo,Marianela Díaz,Mario Gimenez,Alfonso Encinas,Andrés Folguera +6 more
Journal ArticleDOI
Diagenetic model of the Bajo Barreal formation (Cretaceous) in the southwestern flank of the Golfo de San Jorge Basin (Patagonia, Argentina)
TL;DR: In this article, the diagenetic evolution of sandstones belonging to the Bajo Barreal Formation (Cretaceous) in the Golfo de San Jorge Basin (Patagonia, Argentina) is analyzed.
Journal ArticleDOI
Jurassic intraplate contraction of southern Patagonia: The El Tranquilo Anticline area, Deseado Massif
César Navarrete,César Navarrete,Guido M. Gianni,Guido M. Gianni,Rodolfo Christiansen,Yanko Kamerbeek,Santiago Periale,Andrés Folguera,Andrés Folguera +8 more
TL;DR: In this article, a late Early Jurassic shortening event affected the southern end of the back-arc Chubut Basin in southern Patagonia, interspersed within a general lithospheric extensional context linked to Gondwana breakup.
Journal ArticleDOI
Palynological, megafloral and mesofossil record from the Bajo Grande area (Anfiteatro de Ticó Formation, Baqueró Group, Upper Aptian), Patagonia, Argentina
TL;DR: The late Aptian flora of Baquero is one of the best known and accurately dated Cretaceous plant associations from Gondwana, recognized for their well-preserved fossil remains.
References
More filters
Journal ArticleDOI
Approximation of terrestrial lead isotope evolution by a two-stage model
J.S. Stacey,Jan Kramers +1 more
TL;DR: In this paper, a two-stage model for terrestrial lead isotope evolution is proposed, which permits the age of the earth to be that of the meteorite system and also yields good model ages for samples of all ages.
Journal ArticleDOI
Precision Measurement of Half-Lives and Specific Activities of U 235 and U 238
TL;DR: New determinations of the half-lives of half-life values of $ −235 and −238 have been made improved techniques have allowed the halflife values to be measured with greater accuracy than has been heretofore achieved as discussed by the authors.
Journal ArticleDOI
Zircon U–Pb chemical abrasion (“CA-TIMS”) method: Combined annealing and multi-step partial dissolution analysis for improved precision and accuracy of zircon ages
TL;DR: CA-TIMS as discussed by the authors uses high-temperature treatment to anneal zircon lattice radiation damage from natural alpha, alpha recoil, and spontaneous fission processes; this annealing eliminates elemental and isotopic leaching effects that have limited earlier efforts at chemical leaching or multi-step step-wise dissolution or partial dissolution analysis (PDA)
Journal ArticleDOI
Age and timing of the Permian mass extinctions: U/Pb dating of closed-system zircons.
TL;DR: Zircons from nine ash beds within the Shangsi and Meishan sections (China), pretreated by annealing followed by partial attack with hydrofluoric acid, result in suites of consistent and concordant uranium/lead (U/Pb) ages, eliminating the effects of lead loss.
Journal ArticleDOI
Derivation of isotope ratios, errors, and error correlations for U‐Pb geochronology using 205Pb‐235U‐(233U)‐spiked isotope dilution thermal ionization mass spectrometric data
TL;DR: In this article, a comprehensive treatment of the derivation of U-Pb isotope ratios and their corresponding uncertainties from isotope dilution thermal ionization mass spectrometric measurements is presented.