31 documents found, page 1 of 4
Levantamento diferencial evidenciado pelas escadarias de terraços marinhos do C...
Gouveia, Maria Margarina Porto; Martins, António A.; Cunha, P. P.; Gomes, António Alberto; Falguères, Christophe; Voinchet, Pierre; Stokes, MartinThis study focuses on two marine terrace staircases of central Portugal: Cabo Raso (west of Lisboa) and Cabo Espichel (western Arrábida chain). Four emerse marine terraces were found in the Cabo Raso area, while twelve were found at Cabo Espichel, according to geomorphological and stratigraphical studies. Electron Spin Resonance and luminescence dating were used to establish a chronology for the coastal stairca...
Patterns and controls on fluvial incision in the Lower Douro River (Western Ibe...
Gomes, António Alberto; Cunha, P. P.; Martins, A. A.; Stokes, M.; Fernandes, Rui Morais
Pleistocene sea-level highstands and coastal uplift in westernmost Iberia: char...
Cunha, P. P.; Gouveia, M. P.; Martins, A. A.; Falguères, C.; Voinchet, P.; Gomes, António Alberto; Bahain, J. J.; Stokes, M.; Figueiredo, S.; Shao, Q.
Tectonic reactivation of a passive margin landscape: insights from Quaternary r...
Cunha, P. P.; Martins, A. A.; Gouveia, M. P.; Gomes, António Alberto; Falguères, C.; Stokes, M.; Voinchet, P.; Cabral, J.; Bahain, J. J.; Vicente, G. de
Correlation between the fluvial terrace staircases of the lower Tejo River and ...
Gouveia, M. P.; Cunha, P. P.; Martins, A. A.; Falguères, C.; Gomes, António Alberto; Voinchet, P.; Bahain, J. J.
Assessment of metal and metalloid contamination in the waters and stream sedime...
Neiva, A. M. R.; Carvalho, P. C. S.; Antunes, Isabel Margarida Horta Ribeiro; Albuquerque, M. T. D.; Santos, A. C. S.; Cunha, P. P.; Henriques, S. B. A.In the abandoned Mortórios uranium mine area there are quartz veins containing wolframite and sulphides and basic rock dykes with torbernite and autunite cutting a porphyritic granite. The basic rock dykes were exploited and produced about 27 tonnes of U3O8, from 1982 to 1988. There are an open pit lake and nine dumps. Surface water and groundwater are contaminated in U, As, Cd, Cr, Cu, Fe, Mn, Ni and Pb. Strea...
Assessment of metal and metalloid contamination in soils trough compositional d...
Neiva, A. M. R.; Albuquerque, M. T. D.; Antunes, Isabel Margarida Horta Ribeiro; Carvalho, P. C. S.; Santos, A. C. T.; Boente, C.; Cunha, P. P.Soils from the old Mortórios uranium mine area were studied to look for contamination, as they are close to two villages, up to 3 km away, and used for agriculture. They are mainly contaminated in U and As and constitute an ecological threat. This study attempts to outline the degree to which soils have been affected by the old mining activities through the computation of significant hot clusters, Traditional g...
Evolução do relevo de Portugal continental durante o Cenozóico e processos geod...
Cunha, P. P.; Pereira, D. I.; Pereira, PauloNo Mesozóico, o contexto de rifting e margem passiva zeram um aplanamento do Maciço Hespérico, com cristas de resistência. A compressão iniciou-se no Cretácico Final. No Eocénico Médio, dobramento litosférico por compressão gerou a ocidente as bacias do Mondego e Baixo Tejo-Alvalade. No Paleogénico, fracas drenagens continuaram o aplanamento, sob climas áridos a semi-áridos. Dos 24 aos 9,5 Ma, a compressão orie...
The Lourinhã Formation: the Upper Jurassic to lower most Cretaceous of the Lusi...
Mateus, O.; Dinis, J.; Cunha, P. P.This work, as a fieldtrip guide, aims to provide a glimpse into the palaeoenvironments, palaeontology, and diagenesis of one of the most productive areas for Late Jurassic dinosaurs and other vertebrates in Europe, namely, the sites of the Lourinhã Formation, which is coeval with the Morrison Formation of the midwest USA. The Late Jurassic rifting phase of the Lusitanian Basin created several sub-basins separat...
Controls on dryland mountain landscape development along the NW Saharan desert ...
Stokes, M.; Mather, A.E.; Belfoul, M.; Faik, F.; Bouzid, S.; Geach, M.R.; Cunha, P. P.; Boulton, S.J.; Thiel, C.This study documents river terraces from upstream reaches of the Dad es River, a major fluvial system draining the south-central High Atlas Mountains. Terraces occur as straths with bedrock bases positioned at 10 m altitudinal intervals up to 40 m (T1-T5) above the valley floor, becoming less common between 50 and 140 m. The rock strength, stratigraphy and structure of the mountain belt influences terrace distr...