Buscar
Mostrando ítems 21-30 de 99
The Late Neoproterozoic-Early Paleozoic basin of the western Argentine Precordillera: Insights from zircon U-Pb geochronology
(Pergamon-Elsevier Science Ltd, 2020-10)
In central-western Argentina, a belt including marine metasedimentary rocks and mafic-ultramafic bodies occurs throughout the western margin of the Precordillera. The belt is considered as the suture zone between the poorly ...
A Silurian - Devonian marine platform-deltaic system in the San Rafael Block, Argentine Precordillera-Cuyania terrane: Lithofacies and provenance
(Geological Society Publications House, 2009-05)
The San Rafael Block is included as a part of the pre-Andean region, in the southern sector of the Argentine Precordillera-Cuyania terrane, within the western Gondwana margin. The Río Seco de los Castaños Formation (Upper ...
Geochemistry of precordillera serpentinites, western Argentina: Evidence for multistage hydrothermal alteration and tectonic implications for the Neoproterozoic- early Paleozoic
(Universidad de Barcelona, 2015-12)
Serpentinites are a powerful tool to evaluate mantle composition and subsequent alteration processes during their tectonic emplacement. Exposures of this type of rocks can be found in the Argentine Precordillera (Cuyania ...
Cambrian-Ordovician conodonts from slump deposits of the Argentine Precordillera: new insights into its passive margin development
(Cambridge University Press, 2016-10)
The Los Sombreros Formation represents the western continental margin slope deposits of the Argentine Precordillera, a sub-terrane accreted to Gondwana as part of the Cuyania Terrane in early Palaeozoic times. The age of ...
Systematic, morphometric and palaeobiogeographic study of Blainia gregaria Walcott, 1916 (Trilobite, Ptychopariida): Middle Cambrian of the Precordillera of western Argentina
(Wiley, 2012-01-13)
The ptychoparioid trilobite Blainia gregaria Walcott, 1916 is described for the first time from the late middle Cambrian (Series 3) of the Argentine Precordillera. It occurs commonly in the upper part of La Laja Formation, ...
A Middle Ordovician (Darriwilian) dysaerobic brachiopod assemblage from the Precordillera Terrane of Argentina: Implications for early colonization of deep watersUna asociación disaeróbica de braquiópodos del Ordovícico medio (Darriwiliano) del terreno precordillera,argentina: implicaciones para la colonización temprana de las aguas profundas
(Asociacion Paleontologica Argentina, 2015-02)
A rapid increase of water depth associated with dysoxic bottom conditions took place in the central part of the Precordillera basin during the middle Darriwilian. The peak of transgression and drowning of the carbonate ...
New conodont records of the Los Sombreros Formation (Cambrian-Ordovician) from the Western Precordillera, Argentina: Biostratigraphic and palaeoenvironmental implications
(Cambridge University Press, 2019-09)
The presence of a carbonate platform that interfingers towards the west with slope facies allows for the identification of an ancient lower Palaeozoic continental margin in the Western Precordillera of Argentina. The Los ...