GCG - Resumos em livros de actas
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Browsing GCG - Resumos em livros de actas by Author "Alves, Paulo"
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- Guinea-Bissau geological map edition, scale 1:400,000 [Resumo]Publication . Alves, Paulo; Figueiredo, VeraABSTRACT: The recent edition of the Geological Map of the Republic of Guinea Bissau (GB) scale 1:400,000 updates the 1968 Teixeira map published during the Portuguese colonial rule and the Mamedov (1980) unpublished map related to the URSS foreign aid after the independence of GB. The Geological Map is available through the local geological survey (DGGM in Bissau) since 2015 and at the Portuguese geological survey (LNEG) since 2017.
- Património Geológico Cadomiano da região de AbrantesPublication . Henriques, S.B.A.; Alves, Paulo; Machado, SusanaSUMMARY: A well preserved Cadomian basement crops out at the contact between the Ossa Morena Zone and the Central Iberia Zone near Abrantes area. The magmatic and metamorphic activity recorded in this area indicates the existence of a long‐lived continental arc (ca. 692–540Ma) with coeval felsic and mafic magmatism and a final collisional event (ca. 540 Ma). This sequence of events, as well as several tectonic and metamorphic features and well‐preserved outcrops of diverse lithologies provides unique conditions for observing and characterize the Cadomian basement. The Geological Heritage from this area has high scientific and didactic relevance, which permit to interpret the past of the Earth.
- Vendus : a landform of Guinea-Bissau [Resumo]Publication . Alves, Paulo; Silva, TeresaABSTRACT: The Republic of Guinea-Bissau (GB) presents some remarkable geomorphological features such as temporary lakes locally called vendus, meandering rivers, boual / bowal plateaus (hard and dry laterite and bauxite flat surfaces), laterite on successive planation surfaces, collapsed Fe-duricrusts, slope deposits, and finally the Bijagos delta. Vendus are well represented in the 1953 to 1966 old colonial topographic maps scale 1:50,000 and others were identified during fieldwork conducted as part of the edition of the Geological Map of Guinea-Bissau scale 1:400,000 (LNEG and DGGM, as geological surveys of Portugal and GB). These seasonal lakes only occur in the eastern part of the country and the name vendu, a word from the fulbe (fula) dialect, was adopted as this is the main ethnic group on that area.