Jorge Dinis

• PhD
• University of Coimbra

The Upper Cretaceous sedimentary record of the Meso-Cenozoic Western Portuguese Border consists of a thick post-rift succession, discordant over the Triassic, Jurassic and Lower Cretaceous series of the Lusitanian Basin. Its lower boundary matches with the Upper Aptian tectonic event of Western Iberia, and the upper part can be related with the San...

Em Portugal, são conhecidos depósitos do Cretácico em ambas as margens atlânticas do território nacional, quer no Algarve (Bacia Algarvia) quer na ocidental (incluindo a Bacia Lusitânica) Tratam-se de sedimentos carbonatados e siliciclásticos altemantes no tempo e misturando-se no espaço, testemunhado ambientes marinhos pouco profundos, lagunares,...

The present study investigates the climatic influence on the geochemistry and mineralogy of the Lower Cretaceous from the Ericeira region (Lusitanian Basin, western Portugal). It is demonstrated that the weathering indices partially reflect recycling and post-depositional processes and should be largely influenced by shifts in provenance. The conce...

The Lower Cretaceous of the Lusitanian Basin (western Portugal) contains rich assemblages of plant remains. The study of the palynological and mesofossil flora of the Berriasian Bombarral Formation in Vale Painho, near Juncal, contributes to ascertaining the environmental conditions during deposition, the vegetation diversity, and the unit’s age. T...

We collected a set of 120 clay samples with precise stratigraphic locations from the Lower Cretaceous coastal outcrops of the Ericeira area (western Portugal). The kaolinite versus illite dominance can be considered as revealing wet or dry climates, respectively, prevailing in the watershed. Swelling clays are associated with seasonally dry climate...

No Cretácico Inferior, a Península Ibérica estabeleceu uma ponte entre a Laurásia e o Norte de Gondwana. Por isso é uma área muito importante para estudos paleoecológicos e paleobiogeográficos. Desde que alguns registos de troncos fósseis do Cretácico Inferior passaram a ser conhecidos na Península Ibérica, a descoberta de novos restos fossilíferos...

Documenta-se a presença de Frenelopsis teixeirae (Cheirolepidiaceae) no Hauteriviano Inferior de Vale Cortiço (Torres Vedras). Emenda-se a diagnose e completa-se a descrição com base no estudo de cutículas extraídas de pequenos ramos. O enquadramento paleoambiental – estuário ou planície mareal, clima quente a temperado com humidade significativa –...

The Iberian Peninsula formed a connecting bridge between Laurasia and northern Gondwana during the Early Cretaceous, making it a very important study area for palaeoecology and palaeobiogeography. Since few Early Cretaceous fossil wood records are currently known in the Iberian Peninsula, the discovery of new remains from this period is of major si...

A new Early Cretaceous flora is described from the Lusitanian Basin in the Estremadura region (western Portugal) based on a combined study of mesofossils and palynomorphs. The fossil specimens were extracted from samples collected in the Chicalhão clay pit complex, near the village of Juncal from sediments belonging to the Figueira da Foz Formation...

A key issue in coastal hazards research is the need to distinguish sediments deposited by past extreme storms from those of past tsunamis. This study contributes to this aim by investigating patterns of sedimentation associated with extreme coastal flood events, in particular, within the Lagoa de Óbidos (Portugal). The recent stratigraphy of this c...

Resumo: Neste artigo faz-se uma síntese sobre a ocorrência de gimnospérmicas extintas, com características típicas do grupo das Bennettitales, Erdtmanithecales e Gnetales e discute-se o enquadramento estratigráfico de um conjunto de espécimes, previamente descritos. Estas plantas encontram-se representadas por sementes de pequena dimensão recolhida...

This paper presents a synthesis of the occurrence of extinct gymnosperms related to the Bennettitales, Erdtmanithecales and Gnetales group and discusses the stratigraphic setting of previously described specimens. These plants are represented by small fossil seeds collected from Lower Cretaceous (Berriasian to Lower Albian) fluvial siliciclastic de...

Mesofossil and palynomorphs of probable Berriasian age is described from Cretaceous sediments exposed in the Bombarral formation near the village of Juncal in the Estremadura region (western Portugal). Both the palynoflora and mesofossil flora are poor in species diversity and in number of specimens. The palynological assemblage is dominated by pte...

The Lower Cretaceous (Barremian to lower Albian) of Central Portugal yields some of the earliest and best-preserved angiosperms, which are excellent materials to study the mid-Cretaceous fast and huge diversification of angiosperms. Regional stratigraphic and sedimentological studies are crucial to enlighten the timing and environmental forcing fac...

The Cretaceous of Western Portugal has been known since the 19th century as an exceptionally important palaeob-otanical area with numerous sites and exquisitely pre-served plant remains. In particular, the frenelopsids have been recognized since the pioneering publications of two correspondents of Charles Darwin, the Swiss Oswald Heer in 1881 and t...

Dans le Bassin Lusitanien, les dépôts crétacés ont été conservés entre Aveiro et le Rio Sado . Ils occupent un graben parallèle à la côte atlantique, orienté Nord Nord Est – Sud Sud Ouest, jalonné par des accidents d'origine hercynienne. Deux secteurs, septentrional et méridional, peuvent être distingués de part et d'autre du parallèle de Caldas da...

Upper Cenomanian–Turonian clay mineral assemblages of sediments cropping out in the Western High Atlas basin are studied in four sections. Smectite and mixed-layer illite-smectite (I-S) have been identified as major constituents of the deposits. The composition of clay associations in black shales and associated sediments varies considerably accord...

The stratigraphy of the western Portugal on-shore Cretaceous record (western Iberian margin, Lusitanian Basin) is described, including formal units and a selection of informal units prevailing in the geological literature. This paper is a synthesis based on a review of previous works, but with an innovative emphasis on the interpretation of eustati...

In the coast of Central Portugal three lagoons were created by the Holocene flooding of diapiric-related depressions but experienced afterwards a significant sediment accumulation. Fast environmental and morphological changes after the Middle Holocene were clearly forced by anthropogenic activities since the Middle Ages and show a strong feedback o...

This field trip is an invitation to observe several relevant aspects of Early Cretaceous sedimentation across the Lusitanian Basin, during a time span contemporaneous of the first stages of oceanic crust formation in the several rift segments of the Iberia western margin. Stops will be centred in the study of the main depositional environments, as...

. Three transgressive-regressive 2nd-order cycles were identified in the Upper Aptian-Albian fluvial and marine deposits of the Lusitanian Basin. Its widespread nature, probably including eustatic origin, allows correlation between the southern package, with precise stratigraphic positioning, and the northern series with a poorly constrained age. T...

INTRODUCTION In 1992 the Gabinete para a Pesquisa e Exploração de Petróleo (GPEP) contracted the Instituto Pedro Nunes (IPN), an Associated structure of the Coimbra University to carry out studies related to sequence stratigraphy and biostratigraphy of the Upper Jurassic of the Lusitanian Basin. On behalf of the IPN the contract was executed by th...