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Mostrando ítems 11-20 de 244
U-Pb geochronology and paleogeography of the Valanginian–Hauterivian Neuquén Basin: Implications for Gondwana-scale source areas
(Geological Society of America, 2021-02)
Sedimentary basins located at the margins of continents act as the final base level for continental-scale catchments that are sometimes located thousands of kilometers away from the basin, and this condition of exceptionally ...
Assembly of Pampia to the SW Gondwana margin: A case of strike-slip docking?
(Elsevier Science, 2012-03)
Different hypotheses have been proposed to account for the geologic evolution of the southwestern margin of Gondwana in the Early Paleozoic, involving accretion and displacement of different terranes in a protracted ...
The puzzle assembled: Ediacaran guide fossil Cloudina reveals an old proto-Gondwana seaway
(Geological Society of America, 2014-05)
During the Ediacaran the Clymene Ocean separated the Laurentia, Amazonia, and Río Apa cratons from several landmasses to the west forming the proto-Gondwana supercontinent. However, no clear evidence about the existence ...
Pre-Carboniferous Evolution of the San Rafael Block, Argentina. Implications in the SW Gondwana Margin: An Introduction
(Springer, 2017)
The San Rafael Block as part of the Cuyania terrane, lies eastwards of the present-day Andean Cordillera in Mendoza province and it develops south of the Nazca flat-slab subduction zone. It is a geographical region constituted ...
A history of Proterozoic terranes in southern South America: From Rodinia to Gondwana
(Elsevier Academic Press Inc, 2012-03)
The role played by Paleoproterozoic cratons in southern South America from the Mesoproterozoic to the Early Cambrian is reconsidered here. This period involved protracted continental amalgamation that led to formation of ...
Neoproterozoic to lower Palaeozoic successions of the Tandilia System in Argentina: Implication for the palaeotectonic framework of southwest Gondwana
(Springer, 2011-04)
The Cryogenian to Uppermost Ediacaran successions of the Tandilia System (Sierras Bayas Group and Cerro Negro Formation) in central-eastern Argentina is exceptional because of its unmetamorphosed and nearly undeformed ...
Neoproterozoic geodynamic evolution of SW-Gondwana: a southern African perspective
(SPRINGER, 2011)
Our current understanding of the tectonic history of the principal Pan-African orogenic belts in southwestern Africa, reaching from the West Congo Belt in the north to the Lufilian/Zambezi, Kaoko, Damara, Gariep and finally ...
Biogeographic implications of Albian Mohria-like spores (Family Anemiaceae) in SW Gondwana (Patagonia)
(Elsevier Science, 2009-11)
The schizaeaceous extant genus Mohria has a distribution restricted to South Africa and Madagascar area. Its cicatricose spores are characterised by their large size and muri with hollow longitudinal channels unknown in ...