Sedimentología y Paleogeografía de los sistemas de humedales costeros de la FM Leza (Cretácico Inferior, Cuenca de Cameros): implicaciones en el origen y desarrollo de los depósitos microbianos asociados
[EN] This Ph.D. thesis, entitled “Sedimentology and paleogeography of the coastal wetland systems of the Leza Fm (Early Cretaceous, Cameros Basin): Implications on the origin and development of associated microbial deposits”, presents the results of the first detailed and thorough study of the Leza...
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| Format: | doctoral thesis |
| Status: | Published version |
| Publication Date: | 2015 |
| Country: | España |
| Institution: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repository: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/124496 |
| Online Access: | http://hdl.handle.net/10261/124496 |
| Access Level: | Open access |
| Keyword: | Sedimentología Paleogeografía Humedales Cuenca de Cameros Cretácico Inferior Sedimentology Palaeogeography Wetlands Cameros basin Formación Leza (Fm Leza) |
| Summary: | [EN] This Ph.D. thesis, entitled “Sedimentology and paleogeography of the coastal wetland systems of the Leza Fm (Early Cretaceous, Cameros Basin): Implications on the origin and development of associated microbial deposits”, presents the results of the first detailed and thorough study of the Leza Formation (Leza Fm), a mainly carbonate unit (but also including clastic deposits and originally evaporitic deposits, currently preserved as pseudomorphs), which crops out in the region of La Rioja, Northern Spain. The Leza Fm was deposited in the tectonically-active northern margin of the Cameros Basin, a Late Jurassic- Early Cretaceous intraplate extensional basin of the Iberian tectonic plate. No previous works have focused on the Leza Fm as a whole, but many previous authors who studied the geology of the Cameros Basin have mentioned its deposits, and some of them have made interpretations of partial aspects of the unit, especially regarding its age and lateral relationship with other units of the basin, its tectonic context, and its sedimentological origin. Thus, the Leza Fm is a challenging unit with uncertain stratigraphy and age, due to the scarcity of chronostratigraphic markers, and with uncertain sedimentology, due to the occurrence of fossils of both continental and marine affinities. In addition, during the development of this research, an unusual diversity and abundance of microbialites has been discovered in the Leza Fm deposits, adding further complexity to the study of the system. |
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