T he species Allosaurus fragilis, from the Morrison Formation of North America (Kimmeridgian-Tithonian, Upper Jurassic), is one of the best known members of the Theropoda, the group including all predatory non-avian dinosaurs and birds. Here, we report on the first diagnostic theropod remains discovered from the Jurassic of the Iberian Peninsula. The specimen is the first evidence of A. fragilis outside North America. Thus, this taxon represents the first dinosaur species found on two different continents, and suggests the existence of a 'land bridge' between North America and Europe during the Late Jurassic.

ABSTRACT. The stratigraphy of the Santos Basin has become of great interest in the last decade because of the large oil accumulations in pre-salt (rift) and post-salt (drift) strata. Nevertheless, the most accepted stratigraphic models for the drift phase are only at a basin scale and can still be improved by more detailed work. In this paper we analyze an inline seismic section in the modern continental slope of the Santos Basin in order to describe the stratigraphy and to reconstruct relative-sea level (RSL) changes from the Campanian to the Eocene/Oligocene boundary. We mapped 40 seismic horizons, in which clinoform rollovers (former shelf margins) and stratal terminations were recognized. These data allowed for the construction of a chronostratigraphic chart and a RSL curve. The proposed stratigraphic chart displays three lower-order sequence sets comprising higher-order sequences including mostly alternating forced-regressive and normal-regressive system tracts, with the exception of three important transgressive episodes. Higher-order sequences above the intra-Maastrichtian unconformity exhibit low-angle ascending to descending shelf-margin trajectories and frequently truncated topsets, while aggradation was more important during Campanian to Maastrichtian. Expressive mass-transport deposits (chaotic seismic facies) at the bottomsets of some mapped horizons all match with forced-regressive episodes.Keywords: seismic interpretation, sequence stratigraphy, shelf-margin clinoforms.RESUMO. A Bacia de Santos tornou-se de grande interesse na última década devido às acumulações de petróleo no pré-sal (rifte) e pós-sal (deriva). No entanto, os modelos estratigráficos mais aceitos para a fase de deriva são em escala de bacia e podem ser incrementados por trabalhos de maior detalhe. Analisamos uma seção sísmica longitudinal no talude continental atual da bacia, a fim de descrever a estratigrafia e reconstruir mudanças do nível relativo do mar (NRM) do Campaniano ao limite Eoceno/Oligoceno. Quarenta horizontes sísmicos foram mapeados, nos quais margens da plataforma (clinoform rollovers) e terminações estratais foram reconhecidas. Esses dados permitiram a construção de um diagrama cronoestratigráfico e uma curva de variação do NRM. Identificou-se três conjuntos de sequências de menor ordem compreendendo sequências de ordem mais elevada, incluindo, na sua maioria, alternância entre regressão forçada e normal, com exceção de três importantes episódios transgressivos. As sequências de maior ordem acima da inconformidade intra-Maastrichtiano exibem trajetórias ascendentes de baixo ângulo a descendentes de margem de plataforma e topsets truncados, enquanto agradação foi mais importante entre o Campaniano e o Maastrichtiano. Depósitos de transporte de massa (fácies sísmicas caóticas) nos bottomsets de alguns horizontes mapeados associam-se com episódios de regressão forçada.Palavras-chave: interpretação sísmica, estratigrafia de sequências, clinoformas de margem de plataforma.

This research aimed to identify qualitatively and quantitatively productive regions through spatial correlations of wells and geological conditions, such as lineaments, hydrography, aeromagnetometry and different lithologies present in the Crystalline Basement Aquifer System (CBAS), state of Paraná, Brazil. Different methods applied in Precambrian metamorphic and igneous aquifers in the world and some Brazilian states were integrated and applied in CBAS seeking to understand the best scale and approach to productivity. The median productivity of the 224 wells analyzed is 0.29 m 3 /h/m. Under a multi-scale regional assessment, the results showed that the best condition is associated with: the distance of 350 m from the lineaments (1:100,000), especially those with directions N40W, N10E and N70E. Considering hydrolithological units, gneisses are the most productive, especially where lineaments coincide with regional structures, such as shear zones, foliations and Cenozoic tectonic reactivations. Quartzites, granitoids, schists, phyllites, and rhyolites were also favorable when close to important rivers and not necessarily coinciding with regional lineaments, high density, either vertical fractures.The areas of intersection of the lineaments and the weathering mantle did not serve as a discriminatory parameter in this research. As the median depths of the water wells reach 90 m from the surface, the extraction of oriented magnetic gradients referred to magnetic sources down to 800 m depth, thus corroborating surface mapped lineaments and new non-outcropable structures. Considering the complexity of the environment and the global groundwater use of fractured aquifers, this work contributed by discriminating geospatial parameters to decrease the exploratory risk in CBAS.

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