Universitat de Barcelona
Now showing items 23-38 of 38
En esta tesis se revisaron las relaciones que existen entre las poblaciones de dos especies de calamares ommastréfidos Dosidicus gigas y Illex argentinus con las series temporales de la temperatura superficial del mar, ...
Las cuencas sinorogénicas de Cuba se desarrollaron como consecuencia de la convergencia entre las placas del Caribe y Norteamericana. Dicha convergencia evolucionó desde un contexto de subducción-acreción durante el Cretácico ...
The principal objective of this PhD thesis is to obtain a high resolution reconstruction of the climate (temperature and precipitation) in the north Atlantic for the late Holocene. This new reconstruction is from a sedimentary ...
Las perforaciones producidas por microorganismos endolíticos (bacterias, algas, hongos, entre otros) se vienen utilizando en el registro fósil para la interpretación paleoambiental de medios marinos. Las características ...
Here, the larger foraminifera found in Middle Eocene-Early Miocene rocks from Dhofar (Oman) and Socotra Island (Yemen) are studied in detail. The architectural analysis leads to the description of four new genera and nine ...
“El present és la clau del passat”. James Hutton (1788), amb aquesta prou coneguda asserció uniformista, posà els fonaments pel desenvolupament de la investigació geològica moderna des de la perspectiva actualista. ...
Southern Pyrenees has provided an abundant fossil record of dinosaur eggs and eggshells. Historically, the oofamily Megaloolithidae has shown its predominance over any other group of fossil eggs in this region. In addition, ...
The Murzuq Basin is a sedimentary basin located SW Libya which geology remains poorly understood in spite that their proved reserves has been estimated up to 6000 MMb and a number of finds have been recently reported. The ...
El yacimiento de ámbar de El Soplao (Rábago, Cantabria), de edad Cretácico Inferior (hace unos 110 millones de años), ha proporcionado a día de hoy más de 500 bioinclusiones de artrópodos. El estudio morfológico y sistemático ...
Los coleópteros son en la actualidad el grupo biológico con mayor biodiversidad de la Tierra. Se conocen coleópteros fósiles desde el Pérmico, pero conservados en ámbar solo desde el Cretácico inferior. Este tipo de ...
This PhD-Thesis presents a new chronostratigraphy of the Paleogene sedimentary record of the SE margin of the Eastern Ebro Basin. It is based on a number of magnetostratigraphic sections and its integration with marine and ...
The population structure of fishery resources and the impact of environmental factors over its productivity are important processes to be considered in fisheries management. Environmental factors could determine both, the ...
Gas hydrates have been recently recognized as a key factor affecting a number of global processes such as the climatic change, sea floor stability, etc. In this thesis we present the multidisciplinary study of gas hydrate ...
The development of two Arctic Trough Mouth Fans (TMFs), the Storfjorden and Kveithola TMFs, is investigated by means of sub-bottom and seismic reflection profiles, multibeam bathymetry and sediment samples allowing their ...
Calcareous microfossils are not always present in marine or lacustrine sediments owing to unfavourable ecological or post-depositional conditions. These non-carbonated sediments sometimes contain abundant biogenic silica, ...
Aquesta Tesi Doctoral està centrada en la reconstrucció de les condicions climàtiques del passat a la conca occidental del Mediterrani, i més concretament en l’estudi de l’efecte de la variabilitat climàtica d’escala orbital ...
