Resultados de investigación

Resum de les jornades, 948.mp4 948.mp3

Treball de curs dels alumnes de primer de Ciències de l'Educació, 1245.mp4 1245.mp3

Reportatge sobre l'estat dels monuments megalítics al Pirineu aragonès, 1246.mp4 1246.mp3

Imatges de la Biblioteca del Col·legi Universitari de Girona situada a l'edifici del Seminari, 1254.mp4 1254.mp3

1271.mp4 1271.mp3

Imatges de les obres a l'edifici de les Àligues de la Universitat de Girona, 1272.mp4 1272.mp3

The late Cenozoic deposits recovered at ODP Site 637 from the Iberian Abyssal Plain near the continental margin off northwestern Spain include three main facies groups. Turbidites are the dominant facies association (two-thirds of the total thickness), followed by pelagites (one-fourth), and subordinate amounts of contourites (one-tenth). Slump deposits occur locally in the upper Miocene and middle Pliocene. Turbidity currents and pelagic settling were the significant sediment depositional processes from the Pliocene to the Pleistocene, whereas bottom currents predominated during the late Miocene. Fine-grained, base-cut-out turbidites, normally starting with the Td division, are the most abundant sequence type. The pelagites include both carbonate-rich pelagic and hemipelagic facies. The two types of contourites, sandy and calcareous-rich or fine-grained terrigenous, record two types of bottom-current processes. The Cenozoic deposits at Site 637 show a general upward transition from contourites in the upper Miocene to turbidites in the Pliocene-Quaternary. The entire section is rhythmically bedded and has a poorly developed cyclic pattern defined by variations in the total carbonate content. The low sedimentation rates also show the same cyclicity, with lower values for the late Miocene and late Pliocene. This evolution reflects the predominant depositional processes and the dissolution of carbonates by a lower CCD during the late Miocene, Peer reviewed

Peer reviewed

Peer reviewed

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