Buscar
Mostrando ítems 21-30 de 43
The origin and early evolution of dinosaurs
(Wiley Blackwell Publishing, Inc, 2010-02)
The oldest unequivocal records of Dinosauria were unearthed from Late Triassic rocks (approximately 230 Ma) accumulated over extensional rift basins in southwestern Pangea. The better known of these are Herrerasaurus ...
The Grenville-age basement of the Andes
(Pergamon-Elsevier Science Ltd, 2010-01)
The analysis of the basement of the Andes shows the strong Grenville affinities of most of the inliers exposed in the different terranes from Colombia to Patagonia. The terranes have different histories, but most of them ...
Permo-Triassic tetrapods and their climate implications
(Elsevier Science, 2021-10)
The narrow active temperature ranges of ectothermic tetrapods can be used as proxies for reconstructing paleoclimates. Here we deduce the climatic preferences of major Permo-Triassic tetrapod groups based on their known ...
Registro de la Relación Isotópica de Carbono en la paleoflora de la Formación Ischigualasto (Triásico Superior), Noroeste Argentina: Implicancias paleoatmosféricasFloral Carbon Isotopic Record, Ischigualasto Formation (Upper Triassic), Northwest Of Argentina: Paleoatmospheric Implications
(Sociedade Brasileira de Paleontologia, 2011-04)
La Formación Ischigualasto, del Triásico superior, es portadora de una paleoflora muy bien preservada en su porción media-superior (~225Ma). En esta contribución se detallan los primeros estudios isotópicos (i.e. carbono ...
Tetrapod turnover during the Permo-Triassic transition explained by temperature change
(Elsevier Science, 2022-01)
Global temperatures significantly changed from the late Permian to the Early Triassic: the Earth transformed from a cool world to a hothouse climate. This transition undoubtedly had a strong impact on tetrapod physiology ...
Shrimp zircon geochronology constrains on Permian pyroclastic levels, Claromecó Basin, South West margin of Gondwana, Argentina
(Pergamon-Elsevier Science Ltd, 2018-08)
Pyroclastic levels are descripted in Sierras Australes outcrops and Claromeco Basin sub-surface records, interbedded with mudrocks and coal beds in the base of the Tunas Formation sequence that correspond to the Permian ...
Dinosaur origins: evidence from the footprint record
(Taylor & Francis, 2007-03)
Triassic tracks and trackways assigned to dinosaur trackmakers or closest relatives have been mentioned from several Middle to the latest Triassic successions from both northern and southern Pangea. At present, the earliest ...
Jurassic intraplate contraction of southern Patagonia: The El Tranquilo Anticline area, Deseado Massif
(Pergamon-Elsevier Science Ltd, 2019-10)
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. In this work, ...
Re-description and evolutionary remarks on the Patagonian horned turtle Niolamia argentina Ameghino, 1899 (Testudinata, Meiolaniidae)
(Society of Vertebrate Paleontology, 2011-11)
The main objective of this paper is to undertake a detailed re-description of the neotype (skull and lower jaw) and the referred material (postcranial remains) of Niolamia argentina. Additional preparation of this material ...
The Anatomy of Asilisaurus kongwe, a Dinosauriform from the Lifua Member of the Manda Beds (~Middle Triassic) of Africa
(Wiley-liss, div John Wiley & Sons Inc., 2020-04)
The diagnosis of Dinosauria and interrelationships of the earliest dinosaurs relies on careful documentation of the anatomy of their closest relatives. These close relatives, or dinosaur “precursors,” are typically only ...