Buscar
Mostrando ítems 1-10 de 666
The coastal ridge sequence at Rio Grande do Sul: A new geoarchive for past climate events of the Atlantic coast of southern Brazil since the mid Holocene
(Pergamon-Elsevier Science Ltd, 2017-05)
We present here the first geochronometric analysis of a large succession of coastal ridges that developed south of Rio Grande do Sul inlet, aided by OSL dating of samples taken in this succession that amounts c. 306 coastal ...
Seismic ridge subduction and topography: Foreland deformation in the Patagonian Andes
(Elsevier Science, 2005-04)
The Patagonian Andes recorded several episodes of active ridge subduction in the last 80 million years. An analysis of the spatial and temporal relation between the present segment of collision of the Chile ridge and the ...
Asymptotic regimes of ridge and rift formation in a thin viscous sheet model
(American Institute of Physics, 2008-04)
We numerically and theoretically investigate the evolution of the ridges and rifts produced by the convergent and divergent motions of two substrates over which an initially uniform layer of a Newtonian liquid rests. We ...
Meteor induced ridge and trough formation and the structuring of the nighttime E‐region ionosphere
(American Geophysical Union, 2006-12-28)
When meteor‐generated plasma trails diffuse into the ionosphere they create large ambipolar electric fields mainly perpendicular to the Earth's geomagnetic field (B) and extending many kilometers from the trail along B. ...
Upper mantle anisotropy beneath Peru from SKS splitting: constraints on flat slab dynamics and interaction with the Nazca Ridge
(Elsevier, 2015-02)
The Peruvian flat slab is by far the largest region of flat subduction in the world today, but aspects of its structure and dynamics remain poorly understood. In particular, questions remain over whether the relatively ...
Structures and Evolution of the Pleistocenic Sand Beach Ridges in the Patos Lagoon Inlet, RS, BrazilEstrutura e Evolução dos Cordões Arenosos Pleistocênicos no Canal de Acesso à Laguna dos Patos-RS, Brasil
(Instituto de Geociências /Universidade Federal do Rio Grande do Sul, 2004)
Geomorphology and internal architecture of Holocene sandy-gravel beach ridge plain and barrier spits at Río Chico area, Tierra del Fuego, Argentina
(Pergamon-Elsevier Science Ltd, 2018-07)
The internal architecture and processes involved in the development of paraglacial sandy-gravel beach ridges and barrier spits have been analyzed by interpretation of ground-penetrating radar (GPR) records, satellite images ...
The subduction of the Copiapó aseismic ridge, is the causing of the formation of metallic minerals deposits in north of Chile and Argentina?
(Elsevier, 2019-11)
The results obtained in this work evince that the metallic mineral deposits located in the northern region of the Chilean-Pampean flat slab (in northern Chile and north-western Argentina), at approximately 27 300 S, would ...