231 documents found, page 1 of 24
A new species of Acitheca (Psaroniaceae, Marattiales) with exceptionally and th...
Correia, Pedro; Pereira, Sofia; Šimunek, Zbynek; Sá, Artur A.; Pereira, ZéliaABSTRACT: A new fern fossil-species Acitheca machadoi sp. nov. is erected under the family Psaroniaceae (Marattiales), based on adpression fossil remains of fertile foliage from the Monsarros Formation (upper Stephanian C, upper Gzhelian) of the Buçaco Carboniferous Basin, in western central Portugal. Acitheca machadoi comprises relatively narrow and long fertile pinnules bearing exceptionally and three-dimensi...
Megaglomerospora lealiae nov. gen., nov. sp. from the upper Carboniferous of Po...
Correia, Pedro; Sá, Artur A.; Pereira, ZéliaABSTRACT: A new genus and species of fossil fungus, Megaglomerospora lealiae, is described from the Bu & ccedil;aco Carboniferous Basin (upper Stephanian C, Upper Pennsylvanian, upper Carboniferous), in central western Portugal. The new fossil fungus consists of a dense cluster of silicified large spores. These new fungal spores are oblong, subelliptical to subspherical-shaped, with a glabrous surface character...
The Early and Middle Jurassic palynostratigraphy of the Lusitanian Basin (Portu...
Correia, Vânia; Pereira, Zélia; Riding, James; Duarte, Luis; Henriques, Maria Helena; Fernandes, PauloABSTRACT: Palynomorphs, especially dinoflagellate cysts, are important biostratigraphical and palaeoenvironmental tools and their study can be applied to the Lusitanian Basin of Portugal. A palynostratigraphical high-resolution survey was undertaken in eight Lower and Middle Jurassic (upper Sinemurian to lowermost Bathonian) sections from the Lusitanian Basin. We present the resulting biostratigraphical scheme ...
Arquivo de lâminas e superfícies polidas do LNEG, uma coleção de valor científi...
Pereira, Zélia; Quental, Lídia; Jorge, Micael; Teixeira, Rui; Patinha, Pedro; Xavier Matos, João Manuel; Mesquita Soares, SofiaRESUMO: O arquivo histórico do Laboratório Nacional de Energia e Geologia (LNEG) engloba um espólio científico resultante de quase 180 anos de atividade geológica e mineira, o que constitui um banco de dados excecional e um verdadeiro repositório geológico nacional. No âmbito das áreas de missão do LNEG, consta a preservação, tratamento e disponibilização deste património único. Este espólio é considerado patri...
New pollen taxon Syncolpraedapollis angolensis nov. gen. sp. nov.: A noteworthy...
Mendes, Márcia; Pereira, Zélia; Rodrigues, Cristina F.A.; Nsungani, Nsungani, P.C.ABSTRACT: A palynostratigraphic study of the upper Cunga and lower Quifangondo deposits in the Cabo de São Brás section, Kwanza Basin, Angola, has revealed a new pollen named Syncolpraedapollis angolensis nov. gen. sp. nov. This finding was part of a wider survey in the upper Cunga and lower Quifangondo deposits of the Cabo de São Brás section, Kwanza Basin, Angola, covering the latest Eocene to the latest Olig...
Palynological assemblages from Hongguleleng Formation of Western Junggar, North...
Shen, Zhen; Steemans, Philippe; Pereira, Zélia; Zong, Rui-Wen; Zhang, Xin-Song; Ma, Kun-Yuan; Gong, Yi-MingABSTRACT: The Upper Devonian Hongguleleng Formation is a significant stratigraphic unit near the Frasnian/Famennian and Devonian/Carboniferous boundaries of the Kazakhstan Paleoplate. However, its age is still under debate. A new palynostratigraphic analysis was conducted at the Gennaren section to provide a more accurate biostratigraphic assignment. In this study, we identified 43 species belonging to 26 spore...
Idade e ambientes deposicionais da sucessão do Karoo Inferior da Bacia Carboníf...
Fernandes, Paulo; Hancox, J.; Mendes, Márcia; Pereira, Zélia; Lopes, Gilda; Marques, João; Jorge, Raul CG Santos; Albardeiro, Luís
Geocronologia U-Pb dos zircões detríticos das regiões de Moatiz e N'Condedzi, B...
Fernandes, Paulo; Jorge, Raul CG Santos; Albardeiro, Luís; Chew, David; Drakou, Foteini; Pereira, Zélia; Marques, João
The Arrifes geosite: a fascinating glimpse into an Early Cretaceous ecosystem w...
Pereira, H. J. R.; Lopes, Francisco; Pérez-Cano, J.; Santos, Vanda Faria dos; Malafaia, Elisabete; Mendes, Márcia; Pereira, Zélia; Sweetman, Steven C.ABSTRACT: Over a century after Paul Choffat's initial description of the Arrifes section, a pioneering figure in Portuguese geology who highlighted the vertical arrangement of the strata and the occurrence of a limestone bed containing a copious quantity of orbitolinid tests, this upper Barremian–lower Aptian stratigraphic succession, which is fully exposed along a coastal cliff section located 2.5 km west-sout...
The age and depositional environments of the lower Karoo Moatize Coalfield of M...
Fernandes, Paulo; Hancox, J.; Mendes, Márcia; Pereira, Zélia; Lopes, Gilda; Marques, João; Jorge, Raul CG Santos; Albardeiro, LuísABSTRACT: The Moatize Coalfield belongs to a network of continental Karoo basins of central Mozambique, known as the Zambezi Basin. Palynological and sedimentological studies were performed on four coal exploration boreholes to determine the age, depositional settings, and overall geological evolution of its extensive coal deposits. Clastic formations recognised in this coalfield, in ascending order, are the Vú...