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Mudanças globais no Toarciano inferior de Portugal. Relevância científica e imp...
Duarte, L. V.O Toarciano inferior é reconhecido como um período de grandes mudanças à escala planetária. Neste trabalho são apresentadas as principais evidências que justificam a importância da Bacia Lusitânica (Portugal) nos estudos conducentes ao conhecimento destas mudanças globais. Com isto, demonstra-se a relevância do registo sedimentar português, através de um vasto conjunto de experiências científicas e educativas. ...
Ostracodos do Toarciano de Rabaçal (região de Coimbra): novos dados biostratigr...
Loureiro, I. M.; Cabral, M. C.; Duarte, L. V.; Azerêdo, A. C.Foram estudados os ostracodos de 58 amostras margosas representativas de toda a série toarciana do corte de Rabaçal. Esta série margo-calcária, depositada em meio marinho profundo, é rica em macrofauna nectónica e bentónica, estando bem calibrada biostratigraficamente por amonóides e nanofósseis calcários. Os novos resultados agora obtidos para os ostracodos permitem estabelecer uma escala biostratigráfica para...
As falésias calcárias da Península de Peniche (Costa Ocidental Portuguesa): Inv...
Rilo, A. R.; Duarte, L. V.; Tavares, A.A península de Peniche localiza-se na costa oeste portuguesa, integrada numa belíssima paisagem dominada pelo oceano Atlântico. As falésias calcárias da península constituem um local único para observar e estudar a sucessão mais completa do Jurássico inferior de Portugal, cujos afloramentos são considerados de excelente qualidade. A excelência do registo geológico tem levado ao aparecimento de variados artigos ...
The national inventory of geosites in Portugal
Brilha, J. B.; Alcalá, A.; Almeida, A.; Araújo, A.; Azerêdo, Ana; Azevedo, M. R.; Barriga, Fernando; Silveira, A. Brum; Cabral, J.; Cachão, M.During the last three years geoscientists of various institutions have developed a project aiming the setup of a geoconservation strategy in Portugal (Brilha, 2009). One of the main goals of the project was the establishment of an inventory of the most important Portuguese geosites, under the scientific point of view. In a near future, national authorities will consider this inventory as a technical support for...
Lithostratigraphy, sequence stratigraphy and depositional setting of the Pliens...
Duarte, L. V.In the Lusitanian Basin (Central Portugal), the Middle-Upper Liassic series are characterized by an expressive marly limestone accumulation, sediments that were deposited on a homoclinal carbonate ramp. These series belong to the Vale das Fontes, Lemede, S. Gião (and the lateral equivalents Prado and Cabo Carvoeiro Formations) and, partially, to the Póvoa da Lomba Formations. These units, in great part controll...
Preliminary data on the ostracod fauna from the Lower Toarcian of Peniche
Pinto, S.; Cabral, M. C.; Duarte, L. V.Preliminary results of the systematic and biostratigraphical study of the ostracods from the Lower Toarcian (Polymorphum and Levisoni Zones) of Peniche are presented. Most of the identified species are recognized in other European countries. Biodiversity and species abundance are high in the first Zone, decreasing dramatically in the second one.
Calcareous nannofossil assemblages around the Pliensbachian/Toarcian boundary i...
Veiga de Oliveira, L. C.; Perilli, N.; Duarte, L. V.The Pliensbachian/Toarcian boundary (Lower Jurassic) is well represented in the Lusitanian Basin (Portugal), mainly in the Peniche area, recorded by a marl/limestone series. Calcareous nannofossil assemblages are described herein, with the aim to contribute to the Toarcian GSSP definition. Marly samples were collected 3 m below and 7 m above this boundary and analysed for calcareous nannofossils. The main nanno...
Definition of the Portuguese frameworks with international relevance as an inpu...
Bilha, J.; Andrade, C.; Azerêdo, Ana C.; Barriga, F.; Cachão, M.; Cunha, P. P.; Crispim, J. A.; Dantas, P.; Duarte, L. V.; Freitas, M.C.; Granja, M. H.This work constitutes the first contribution for the systematisation of the geological heritage knowledge in Portugal, following the international recomendations for the characterisation of geological heritage (IUGS, ProGEO). The application of the ProGEO methodology has resulted on the creation of fourteen frameworks with international relevance, established by consensus among the Portuguese geological communi...
Definition of the Portuguese frameworks with international relevance as an inpu...
Brilha, J.; Cunha, Pedro P.; Azerêdo, A.; Barriga, F. J. A. S.; Azeredo, A.; Cachão, M.; Couto, H.; Andrade, C.; Crispim, J. A.; Dantas, P.This work constitutes the first contribution for the systematisation of the geological heritage knowledge in Portugal, following the international recomendations for the characterisation of geological heritage (IUGS, ProGEO). The application of the ProGEO methodology has resulted on the creation of fourteen frameworks with international relevance, established by consensus among the Portuguese geological communi...
Definition of the Portuguese frameworks with international relevance as an inpu...
Brilha, J. B.; Andrade, César; Azerêdo, Ana; Barriga, Fernando; Cachão, M.; Couto, Helena; Cunha, P. P.; Crispim, J. A.; Dantas, Pedro; Duarte, L. V.This work constitutes the first contribution for the systematisation of the geological heritage knowledge in Portugal, following the international recomendations for the characterisation of geological heritage (IUGS, ProGEO). The application of the ProGEO methodology has resulted on the creation of fourteen frameworks with international relevance, established by consensus among the Portuguese geological communi...
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