Modelação de depósitos minerais amostrados por suportes irregulares. O caso de estudo do depósito de Farim-Saliquinhé na Guiné-Bissau. (2012)
Gilberto Charifo Baldé
PhD: Engª Geológica, DCT/FCT/UNL
Supervision: José António de Almeida e António Ferreira
Status: Concluída |
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Mesofloras e palinofloras do Cretácico Inferior da bacia Lusitaniana (Portugal) (2011)
Mário Miguel Cardoso Mendes
Abstract
The Portuguese Cretaceous flora is rich and comprising specimens of great paleontological interest. This palaeobotanical record allows the analysis of the floristic evolution since the Early Cretaceous, mostly with gymnosperms and ferns, to the Late Cretaceous, showing that angiosperms have quickly expanded and colonized almost all the terrestrial ecosystems.
The earlier publications on the Portuguese Cretaceous floras, since the 19th century, studied mainly macroremains and become world classics in Palaeobotany. Later and up to now, the majority of studies used palynology as a stratigraphic tool, but over the last twenty-five years the discovery of well preserved mesofossil floras represented by fruits seeds, stamens and flowers have provided an extremely fast progress on the understanding of angiosperms systematic composition, evolution and diversity.
This dissertation presents the study of mesofloras and palinofloras from the Early Cretaceous of Portugal carried out in three different opencast clay pit complexes exposing deposits of the Lusitanian Basin, in Portugal. The selected occurrences from Vale Painho (near JuncalL Vale Cortiço (close to Torres Vedras) and Vale Farelo (next to Vale de Agua, Juncal). The gymnosperms and pteridophytes are clearly dominant in all the mesofloras studied. Angiosperms remains were recognised only in the Vale de Agua mesoflora.
In the Vale Painho levels (probably Berriasian) small seeds were identified and assigned to new taxa. We described the new species Erdtmanispermum juncalense and the new genus and species Raunsgaardispermum lusitanicum. The new fossil seeds have a distinctive anatomical structure similar to those observed in the seeds of Bennettitales, Erdtmanithecales and Gnetales group (clade BEG) a sclerenchymatic outer envelope that surrounds the integument and the nucellus preserved as a thin membrane. The integument is extended apically into a long, narrow micropylar canal.
For the first time a Berriasian Portuguese flora is described based on the integrated study of mesofossil plants and palynomorphs. The associations indicate the presence of a coniferous forest dominated by Cheirolepidiaceae with a grown cover and understory vegetation of ferns and other pteridophytes as well as members of the BEG group. This study points to an environment with seasonal drought climate in which vegetation was developing, and probably better preserved, mainly along rivers and wetlands.
In the Vale Farelo mesoflora (Late Aptian-Early AlbianL it was recognised a new pollen organ with well-preserved pollen grains of Eucommiidites-type in the sporangia, assigned to the new species Erdtmanitheca portucalensis. Sedimentological interpretations for the plant-bearing unit, the Famalicao Member of the Figueira da Foz Formation, point for fluvial deposition under wet and relatively humid climate.
The discovery of these new taxa in the Portuguese mesofloras represents a significant contribution to the knowledge of the geographical distribution of these Mesozoic plants, and its palaeoecological significance should be emphasized since they co-existed with the earliest flowering plants in terrestrial ecosystems with similar environmental characteristics.
In the Vale Cortiço mesoflora (early Hauterivian) abundant conifers remains assigned to Frenelopsis teixeirae were collected. The original diagnosis of the species was emended and the description was completed thank to well preserved cuticle compressions from leaves and twigs. The characteristics of the external morphology of these plants and the presence of pollen assigned to the genus Classopollis point to arid to semi-arid environments. The sedimentological data indicate tidal-flat to estuarine depositional environment, developed under temperate to warm climate, but with significant seasonal moisture.
PhD: Geociências, Universidade de Évora
Supervision: João Pais (Orientador)
Status: Concluída |
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A utilização de GeoColecções na produção de sistemas de informação para apoio ao ensino e divulgação das Ciências da Terra – Aplicação à Colecção de Mineralogia do Museu Geológico (2011)
Patrícia Alexandra Oliveira Silva Marta
Supervision: Joaquim Simão e Nuno Leal
Status: Em curso |
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Caracterização e melhoramento de solos moles (2010)
Alexandre Santos Ferreira
PhD: Engª Geológica, DCT/FCT/UNL
Supervision: José Alcino Rodrigues Carvalho
Status: Em curso |
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O enquadramento legal e institucional do recurso solo e as suas implicações com os recursos hídricos (2010)
Maria Teresa Matos Ferreira
PhD: Engª Geológica, DCT/FCT/UNL
Supervision: Maria da Graça Brito
Status: Em curso |
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Análise Crítica do Ensino de Geologia em Portugal e Propostas de Adequação (curriculares, metodológicas e de objectivos). (2010)
Sandrina Brito
PhD: Geologia, DCT/Fac. Ciências e Tecnologia da UNL
Supervision: P. Legoinha
Status: Em curso |
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Modelação de atributos hidrogeológicos do maciço envolvente à antiga área mineira da Quinta do Bispo (2010)
Sofia Barbosa
RESUMO: O objectivo deste trabalho é apresentar uma metodologia que permita a geração de um modelo 3D de transmissividade em meios rochosos de Granitos Hercínicos e Metasedimentos do Complexo Xisto-Grauváquico, de elevada heterogeneidade, com vários graus de alteração e de fracturação. O caso de estudo é o maciço envolvente à antiga área mineira Quinta do Bispo.
PhD: Engª Geológica, DCT/FCT/UNL
Supervision: José António Almeida; António Chambel (Univ. Évora)
Status: Concluída |
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Contribuição para a caracterização geotécnica dos Gabros de Beja (2010)
Sofia Maria Mesquita Soares
PhD: Engª Geológica, DCT/FCT/UNL
Supervision: Ana Paula Silva
Status: Concluída |
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Evolution of teeth and feeding-related bones in non-avian theropods (2009)
Christophe Hendrickx
PhD: Geologia, DCT/FCT/UNL
Supervision: O. Mateus
Status: Em curso |
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Estudo da influência do nevoeiro salino nas propriedades de calcários portugueses (2009)
Cristina Carvalho
PhD: Geologia, DCT/FCT/UNL
Supervision: Zenaide Silva & Joaquim Simão
Status: Em curso |
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Evolution of diplodocid sauropod dinosaurs with emphasis on specimens from Howe Ranch (Wyoming, USA) (2009)
Emanuel David Tschopp
PhD: Geologia, DCT/FCT/UNL
Supervision: O. Mateus & Martin Sanders
Status: Em curso |
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Palinologia do Pliocénico da orla ocidental Norte e Centro de Portugal: contributo para a compreensão da cronostratigrafia e da evolução paleoambiental (2009)
Manuel Carlos Marques Vieira
PhD: Geologia, Universidade do Minho
Supervision: JOÃO PAIS e Diamantino Pereira
Status: Concluída |
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Esqueleto post-craniano de uma população catastrófica relacionada com o Terramoto de 1755 (2008)
André d’Almeida
Supervision: M. T. ANTUNES
Status: Em curso |
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Sobre material antropológico de vítimas de 1755 obtido na Academia das Ciências de Lisboa “Paleodemografia e paleopatologia de uma associação de restos esqueléticos não identificados de uma população catastrófica relacionada com o terramoto de 1755” (2008)
Cristiana Pereira
Supervision: M. T. ANTUNES
Status: Em curso |
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Dinoflagelados e outros palinomorfos do Miocénico do sector distal da Bacia do Baixo-Tejo (2006)
Lígia Sousa Castro
PhD: Geologia (Estratigrafia e Paleobiologia), Universidade Nova Lisboa
Supervision: J. PAIS
Status: Concluída |
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Dinossauros do Jurássico Superior de Portugal, com destaque para os saurísquios (2005)
O. MATEUS
PhD: Universidade Nova de Lisboa, Lisboa
Supervision: M. T. ANTUNES
Status: Concluída |
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Mineralogia e geoquímica de sequências sedimentares do Jurássico – Cretácico da Bacia Lusitaniana. (2004)
Paulo Sá Caetano
Supervision: R. B. ROCHA
Status: Concluída |
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