Dinàmica de la Terra i de l'Oceà: Enviaments recents
Ara mostrant els elements 201-220 de 1037
Three Millennia of Climatic, Ecological, and Cultural Change on Easter Island: An Integrative Overview
Eastern Island (Rapa Nui) is famous for the legacy of an extinct civilization symbolized by the megalithic statues called moai. Several enigmas regarding the colonization of the island its deforestation and a presumed ...
Magnetobiochronology of lower Pliocene marine sediments from the lower Guadalquivir Basin: insights into the tectonic evolution of the Strait of Gibraltar area
The Gibraltar Arc is a complex tectonic region, and several competing models have been proposed to explain its evolution. We studied the sedimentary fill of the Guadalquivir Basin to identify tectonic processes that were ...
Efectes de la pesca d'arrossegament en els sediments dels canyons submarins catalans.
Bottom trawling is a nonselective commercial fishing technique whereby heavy nets and gear are pulled along the seafloor, modifying the physical properties of seafloor sediments and altering natural sediment fluxes. Most ...
Contexto estructural y paleogeográfico de los sistemas lacustres cenozoicos de España.
La evolución de los sistemas lacustres cenozoicos en España estuvo claramente influida por: l) la edificación de los orógenos pirenaico y bético y la intensa deformación interna que afectó la microplaca de Iberia. 2) l0s ...
Magnetostratigraphy of the Miocene continental deposits of the Montes de Castejón (central Ebro basin, Spain): geochronological and paleoenvironmental implications
A detailed magnetostratigraphic study has been carried out in the early to middle Miocene distal alluvial and lacustrine sediments of the Montes de Castejón (central Ebro Basin). The study was based on the analysis of 196 ...
Interpolation algorithm ranking using cross-validation and the role of smoothing effect. A coal zone example
For a property measured at several locations, interpolation algorithms provide a unique and smooth function yielding a locally realistic estimation at any point within the sampled region. Previous studies searching for ...
Caracterización geológica de la región de enlace entre la Cuenca de Bransfield y la Dorsal Sur de Scotia (Antártida)
La Dorsal Sur de Scotia (DSS) constituye une frontera de placas transformante con sentido senestral, que limita las placas de Scotia, al norte, y Antártica, al sur. Durante la campaña de geología y geofísica marinas 'Scotia ...
Salt Diapirs and Minibasins along a Transect across the Basque-Cantabrian Pyrenees: Implications for Cover-Basement Interaction during Rifting and Inversion.
The Basque‐Cantabrian Pyrenees experienced Early Cretaceous rifting and latest Cretaceous toCenozoic inversion, with the presence of prerift Upper Triassic Keuper salt influencing how deformation wasaccommodated. Considerable ...
Formación e inversión de cuencas sinclinales con sal pre-cinemática. Resultados experimentales aplicados a la Cuenca de las Columbrets (Mediterráneo Occidental)
La extensión Jurásico - Cretácico Inferior que tuvo lugar en Europa y en el Atlántico Norte dio lugar a la formación de varios sistemas de rift. Asociados a estos y a la presencia de evaporitas en la parte basal de su ...
Short and long-term effects of GPS measured crustal deformation rates along the South-Central Andes
In this study we present the contemporary crustal deformation field along the central and southern Andes (17-42\deg S) estimated from four Global Positioning System (GPS) campaigns conducted in 1994-97. We find that the ...
Three-dimensional characterisation of sedimentary heterogeneity and its impact on subsurface flow behaviour through the braided-to-meandering fluvial deposits of the Castissent Formation (late Ypresian, Tremp-Graus Basin, Spain)
Fluvial deposits of the Castissent Formation (late Ypresian) form part of the Eocene infill of the Tremp-Graus piggyback basin. The Castissent Formation has been subdivided into three complexes (A, B, and C). This project ...
Rockfall travel distance analysis by using empirical models (Solà d'Andorra la Vella, Central Pyrenees)
The prediction of rockfall travel distance below a rock cliff is an indispensable activity in rockfall susceptibility, hazard and risk assessment. Although the size of the detached rock mass may differ considerably at each ...
Estructura y evolución tectónica del sector oriental del margen continental cantábrico: resultados de los perfiles de sísmica multicanal MARCONI
El Golfo de Vizcaya se formó durante el Cretácico como consecuencia de la apertura del Océano Atlántico. La convergencia entre las placas Euroasiática e Ibérica durante el Cenozoico dio lugar al levantamiento de la cordillera ...
Significación de los briozoos en los sedimentos superficiales de la plataforma continental del Cabo de Gata (Almería, España)
Los briozoos son parte importante de los constituyentes esqueléticos en los sedimentos superficiales de la plataforma continental del Cabo de Gata. El estudio especifico de los briozoos en 12 muestras analizadas, permite ...
New geoelectrical characterization of a continental collision zone in the Central - Eastern Pyrenees: Constraints from 3-D joint inversion of electromagnetic data
Continent-continent collisions are responsible for the formation of large mountain ranges like the Himalayas and the Alps and play a primary role in the development of the continents. The continental collision between the ...
Relation of surface and underground waters in Chungará and Cotacotani lake districts, northern Chile: an isotopic study.
Lake Chungará and Cotacotani lake districts are surface water bodies located to the northwest of Lauca Basin in the northern Chilean Altiplano. Surface and underground waters show low to moderate saline content and an ...
Datos paleomagnéticos en materiales sin-diapíricos Aptienses-Albienses (cuenca Vasco-Cantábrica, N Iberia).
In order to obtain a kinematic model linking the diapir formation and the geometry of the syn-diapir sediments, a paleomagnetic study has been conducted in selected syn-diapiric sequences of the Basque-Cantabrian Basin. ...
Evaluating the use of amber in palaeoatmospheric reconstructions: The carbon-isotope variability of modern and Cretaceous conifer resins.
Stable carbon-isotope geochemistry of fossilized tree resin (amber) potentially could be a very useful tool to infer the composition of past atmospheres. To test the reliability of amber as a proxy for the atmosphere, we ...
Seasonal variation in plastic litter pollution in mangroves from two remote tropical estuaries of the Colombian Pacific
Mangroves in estuaries are highly vulnerable to the impacts of plastic litter pollution, because their location at river mouths and the high capacity of mangrove trees to trap plastic items. Here, we present new results ...
Magnetostratigraphy and stable isotope stratigraphy of the middle-Eocene succession of the Ainsa basin (Spain): New age constraints and implications for sediment delivery to the deep waters
Stratigraphic cycles preserved in sedimentary successions are controlled by the interaction of tectonics, climate, sediment supply and sea-level variations. Understanding the influence of these drivers on sedimentary systems ...
