Encontrados 12 documentos, a visualizar página 1 de 2
New Insights on the Upper Triassic Silves Group in Algarve Basin, Portugal: Pal...
Vilas Boas, Margarida; Pereira, Zélia; Cirilli, Simonetta; Fernandes, PauloABSTRACT: This paper presents the results of palynostratigraphic studies in the Silves Group in the Algarve Basin, Portugal. From bottom to top comprises the Silves Sandstones, the Silves Marl-Carbonate Evaporitic Complex, and the Volcano-Sedimentary Series. This study aims to detail the age of the Silves Group, bracketing the Triassic-Jurassic transition, using palynology. For this purpose, 250 samples were co...
New insights on the upper triassic silves group in Algarve Basin, Portugal: pal...
Vilas Boas, Margarida; Pereira, Zélia; Cirilli, Simonetta; Fernandes, PauloThis paper presents the results of palynostratigraphic studies in the Silves Group in the Algarve Basin, Portugal. From bottom to top comprises the Silves Sandstones, the Silves Marl-Carbonate Evaporitic Complex, and the Volcano-Sedimentary Series. This study aims to detail the age of the Silves Group, bracketing the Triassic-Jurassic transition, using palynology. For this purpose, 250 samples were collected fr...
Palynology of the Triassic : Jurassic of the Silves Group in Portugal, its impl...
Vilas Boas, MargaridaABSTRACT: The biostratigraphy of the Lusitanian and Algarve basins is based on macrofossils and microfossils (foraminifers, nannofossils, and ostracods). Compared to these works, palynological studies are rare in these basins. Palynomorphs are a powerful biostratigraphic and paleoenvironmental tool, and their research could significantly contribute to the context of the two basins. In this project, the Upper Tr...
New palynostratigraphical data of the Silves Group, Algarve Basin
Vilas Boas, Margarida; Fernandes, Paulo; Pereira, Zélia; Cirilli, SimonettaSUMÁRIO: Este trabalho mostra dados palinostratigráficos que permitem aperfeiçoar a idade do Grupo de Silves na Bacia do Algarve. O Grupo de Silves constitui a unidade sedimentar mais antiga desta bacia e foi depositado de forma discordante sobre os turbiditos do Carbonífero superior da Formação Brejeira, dobrados e falhados durante a Orogenia Varisca. Os novos dados obtidos, permitem-nos apontar o início da se...
Palynology of the Triassic : Jurassic of the Silves Group in Portugal, its impl...
Vilas Boas, MargaridaABSTRACT: The biostratigraphy of the Lusitanian and Algarve basins is based on macrofossils and microfossils (foraminifers, nannofossils, and ostracods). Compared to these works, palynological studies are rare in these basins. Palynomorphs are a powerful biostratigraphic and paleoenvironmental tool, and their research could significantly contribute to the context of the two basins. In this project, the Upper Tr...
Palynology and palynofacies studies in the lowermost Jurassic of the Lusitanian...
Vilas Boas, Margarida; Pereira, Zélia; Cirilli, Simonetta; Duarte, L. V.; Sêco, Sérgio Luís Rodrigues; Fernandes, PauloABSTRACT: he Silves Group of the Lusitanian Basin in Portugal represents the initial infill of the continental rifting basins that formed during the breakup of northern Pangaea regions. Evaporites, especially halite, mark the transition from continental to marine settings and the beginning of the deposition in passive margin basins. This work presents the results of the palynostratigraphic and palynofacies anal...
Palynology and palynofacies studies in the lowermost Jurassic of the Lusitanian...
Vilas Boas, Margarida; Pereira, Zélia; Cirilli, Simonetta; Duarte, Luís Vítor; Sêco, Sérgio Luís Rodrigues; Fernandes, PauloThe Silves Group of the Lusitanian Basin in Portugal represents the initial infill of the continental rifting basins that formed during the breakup of northern Pangaea regions. Evaporites, especially halite, mark the transition from continental to marine settings and the beginning of the deposition in passive margin basins. This work presents the results of the palynostratigraphic and palynofacies analysis of t...
The age of the first pulse of continental rifting associated with the breakup o...
Vilas Boas, Margarida; Paterson, Niall W.; Pereira, Zélia; Fernandes, Paulo; Cirilli, SimonettaABSTRACT: In this work, we report the first palynological age for the base strata of the Silves Sandstones of the Silves Group in the Algarve Basin, located in Southern Portugal. The group is the oldest sedimentary unit of the Algarve Basin and was deposited unconformably over late Pennsylvanian turbidites of the Mira Formation, which were folded and faulted during the Variscan Orogeny. The Silves Group compris...
The age of the first pulse of continental rifting associated with the breakup o...
Vilas Boas, Margarida; Paterson, Niall W.; Pereira, Zélia; Fernandes, Paulo; Cirilli, SimonettaIn this work, we report the first palynological age for the base strata of the Silves Sandstones of the Silves Group in the Algarve Basin, located in Southern Portugal. The group is the oldest sedimentary unit of the Algarve Basin and was deposited unconformably over late Pennsylvanian turbidites of the Mira Formation, which were folded and faulted during the Variscan Orogeny. The Silves Group comprises a detri...
Palynostratigraphy of the Triassic-Jurassic of the Silves Group, Lusitanian Bas...
Vilas Boas, Margarida; Pereira, Zélia; Cirilli, Simonetta; Duarte, L. V.; Fernandes, PauloABSTRACT: We studied the miospore assemblage from an Upper Triassic to Lower Jurassic succession of the Silves Group near Coimbra, Portugal. The latter consists of, from base to top, the Conraria, Penela, Castelo Viegas, and the Pereiros formations. The palynological assemblages allowed establishing an informal palynozonation and providing new biostratigraphic that helped constrain the age attribution to the Si...