3 documents found, page 1 of 1
Estudio preliminar de los sistemas fluviales cenozoicos de la Cuenca del Guadia...
Palomares, M. E. M.; Azevedo, T. M.; Rodriguez-Plaza, M.A sequência estratigráfica cenozóica da bacia do Guadiana entre Mérida e Badajoz está representada por depósitos de leque aluvial e fluviais. Neste trabalho apresenta-se urna primeira descrição de duas das unidades de preenchimento da bacia. A primeira corresponde a sedimentos de idade miocénica que se encaixaram nos depósitos de Ieque aluvial, que os antecedem, desenvolvendo um sistema fluvial com urna direcçã...
Floodplain sediments of the Tagus River, Portugal: assessing avulsion, channel ...
Azevedo, T. M.; Ramos Pereira, A.; Ramos, C.; Nunes, E.; Freitas, M. C.; Andrade, C.; Pereira, D. I.A study of the Tagus River floodplain (Portugal) has been carried out using a variety of methods including sedimentological, geochemical and geochronological analyses, as well as geomorphological and hydrological studies, performed in order to characterize the flood sediments and the dynamics of the river during the Holocene. Until the 19th century, the Tagus was an anastomosed river, with multiple channels sep...
Late Holocene evolution of the lower Tagus alluvial plain and heavy metals cont...
Ramos, C.; Reis, Eusébio; Ramos Pereira, A.; Azevedo, T. M.; Nunes, E.; Freitas, M. C.; Andrade, M. C.This paper aims to contribute to the fluvial dynamic knowledge of the Lower Tagus during the late Holocene. Two cores were done in selected geomorphological positions at the alluvial plain. Each ten centimeters of sediments were submitted to sedimentological and geochemical analyses in order to identify human contamination by heavy metals, sedimentation rates and environmental changes in the main channel positi...