Annales de la Société entomologique de France (N.S.), 2010
Lusitaneura covensis n. gen., n. sp., from the Late Carboniferous (Lower Stephanian C) of the Dou... more Lusitaneura covensis n. gen., n. sp., from the Late Carboniferous (Lower Stephanian C) of the Douro Basin (NW of Portugal), is the fi rst Portuguese representative of the Palaeozoic insect order Caloneurodea. Résumé. Lusitaneura covensis n. gen., n. sp., premier Caloneurodea du Carbonifère du Portugal (Insecta : Pterygota : Panorthoptera). Lusitaneura covensis n. gen., n. sp. est le premier représentant portugais de l'ordre d'insectes paléozoïques des Caloneurodea. Il provient du Carbonifère supérieur (Stéphanien C inférieur) du Bassin du Douro (NW du Portugal).
Assinalam-se novos elementos megafloristicos na Bacia Carbonifera do Douro (Estefaniano C inferio... more Assinalam-se novos elementos megafloristicos na Bacia Carbonifera do Douro (Estefaniano C inferior) [Gzheliano inferior], colectados na regiao de Sao Pedro da Cova (Gondomar).
The Porto-Coimbra-Tomar shear zone is a linear fault zone, trending NNW from Porto to Tomar in th... more The Porto-Coimbra-Tomar shear zone is a linear fault zone, trending NNW from Porto to Tomar in the crystalline polymetamorphosed belt of the Iberian Variscides. This zone is 1 to 5 km wide and contains a very characteristic and ubiquitous tectonostratigraphy. The Porto-Coimbra-Tomar shear zone is located in the Western Iberian Line, which delineates a major tectonic corridor extending for more than 520 km, from Tomar (Portugal) to Finisterre (Galicia, Spain). The Porto-Coimbra-Tomar shear zone has been interpreted as a fundamental crustal tectonic boundary, represented locally by dextral strike-slip faults and thrusts. Early Carboniferous brittle deformed metasedimentary sequences in the northernmost region (Porto-Albergaria-a-Velha metamorphic belt, NW Portugal) of the Ossa-Morena Zone contain black shales of very low to low-grade metamorphism. These metapelitic imbrications form a discrete NNW-trending structure within the Porto-Coimbra-Tomar shear zone, which remain subparallel to the observed major regional structures (shear zones, thrusts and/or overthrusts). Along the major imbricated accidents these discrete strike-slip basins, clearly show a tectonic sigmoidal shape. These black shales are overhanged and then imbricated in an Upper Proterozoic metamorphic substratum (Arada Unit). A multi-disciplinary approach of the organic-rich rocks from Albergaria-a-Velha/Sernada do Vouga (Aveiro, NW Portugal) region took advantage of the use of tectonostratigraphy, structural geology, geomorphology, palynology, organic petrology and clay mineralogy combined methods. Geodynamic implications for the Iberian Variscides of the Palaeozoic basement framework are discussed.
No presente trabalho apresentamos um modelo sedimentar genetico e evolutivo para a bacia interior... more No presente trabalho apresentamos um modelo sedimentar genetico e evolutivo para a bacia interior do Cuanza (Cretacico Inferior-Plistocenico) localizada no NW de Angola. Os trabalhos de campo incidiram sobre afloramentos na area de Cabo Ledo. Dos estudos efectuados concluimos que as formacoes presentes sao: Tuenza Dolomitico, Quissonde, Cabo Ledo, Itombe, Teba, Quifangondo, Luanda Cacuaco. A correlacao sedimentologico/estratigrafica dos afloramentos, pocos e sondagens existentes na area, permitiu reconhecer a arquitectura litoestratigrafica bem como proceder a construcao de colunas litoestratigraficas reconstituidas (padrao). Os estudos efectuados permitiram concluir que a regiao apresenta uma evolucao sedimentar marcada por trangressao marinha desde o Aptiano ate ao Maastrichtiano. Assim, sobre as litologias de facies continental da Formacao do Cuvo (Barremiano), a trangressao marinha surge marcada por ambientes de playa na base passando a ambientes lagunares e progradando ate lito...
Annales de la Société entomologique de France (N.S.), 2010
Lusitaneura covensis n. gen., n. sp., from the Late Carboniferous (Lower Stephanian C) of the Dou... more Lusitaneura covensis n. gen., n. sp., from the Late Carboniferous (Lower Stephanian C) of the Douro Basin (NW of Portugal), is the fi rst Portuguese representative of the Palaeozoic insect order Caloneurodea. Résumé. Lusitaneura covensis n. gen., n. sp., premier Caloneurodea du Carbonifère du Portugal (Insecta : Pterygota : Panorthoptera). Lusitaneura covensis n. gen., n. sp. est le premier représentant portugais de l'ordre d'insectes paléozoïques des Caloneurodea. Il provient du Carbonifère supérieur (Stéphanien C inférieur) du Bassin du Douro (NW du Portugal).
Assinalam-se novos elementos megafloristicos na Bacia Carbonifera do Douro (Estefaniano C inferio... more Assinalam-se novos elementos megafloristicos na Bacia Carbonifera do Douro (Estefaniano C inferior) [Gzheliano inferior], colectados na regiao de Sao Pedro da Cova (Gondomar).
The Porto-Coimbra-Tomar shear zone is a linear fault zone, trending NNW from Porto to Tomar in th... more The Porto-Coimbra-Tomar shear zone is a linear fault zone, trending NNW from Porto to Tomar in the crystalline polymetamorphosed belt of the Iberian Variscides. This zone is 1 to 5 km wide and contains a very characteristic and ubiquitous tectonostratigraphy. The Porto-Coimbra-Tomar shear zone is located in the Western Iberian Line, which delineates a major tectonic corridor extending for more than 520 km, from Tomar (Portugal) to Finisterre (Galicia, Spain). The Porto-Coimbra-Tomar shear zone has been interpreted as a fundamental crustal tectonic boundary, represented locally by dextral strike-slip faults and thrusts. Early Carboniferous brittle deformed metasedimentary sequences in the northernmost region (Porto-Albergaria-a-Velha metamorphic belt, NW Portugal) of the Ossa-Morena Zone contain black shales of very low to low-grade metamorphism. These metapelitic imbrications form a discrete NNW-trending structure within the Porto-Coimbra-Tomar shear zone, which remain subparallel to the observed major regional structures (shear zones, thrusts and/or overthrusts). Along the major imbricated accidents these discrete strike-slip basins, clearly show a tectonic sigmoidal shape. These black shales are overhanged and then imbricated in an Upper Proterozoic metamorphic substratum (Arada Unit). A multi-disciplinary approach of the organic-rich rocks from Albergaria-a-Velha/Sernada do Vouga (Aveiro, NW Portugal) region took advantage of the use of tectonostratigraphy, structural geology, geomorphology, palynology, organic petrology and clay mineralogy combined methods. Geodynamic implications for the Iberian Variscides of the Palaeozoic basement framework are discussed.
No presente trabalho apresentamos um modelo sedimentar genetico e evolutivo para a bacia interior... more No presente trabalho apresentamos um modelo sedimentar genetico e evolutivo para a bacia interior do Cuanza (Cretacico Inferior-Plistocenico) localizada no NW de Angola. Os trabalhos de campo incidiram sobre afloramentos na area de Cabo Ledo. Dos estudos efectuados concluimos que as formacoes presentes sao: Tuenza Dolomitico, Quissonde, Cabo Ledo, Itombe, Teba, Quifangondo, Luanda Cacuaco. A correlacao sedimentologico/estratigrafica dos afloramentos, pocos e sondagens existentes na area, permitiu reconhecer a arquitectura litoestratigrafica bem como proceder a construcao de colunas litoestratigraficas reconstituidas (padrao). Os estudos efectuados permitiram concluir que a regiao apresenta uma evolucao sedimentar marcada por trangressao marinha desde o Aptiano ate ao Maastrichtiano. Assim, sobre as litologias de facies continental da Formacao do Cuvo (Barremiano), a trangressao marinha surge marcada por ambientes de playa na base passando a ambientes lagunares e progradando ate lito...
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