The Oko Limestones: a Late Miocene-Pliocene fluvial to palustrine-lacustrine carbonate wetland enclosed in the SouthPyrenean Thrust Front (Navarre, Spain)
- Asier Valenzuela 1
- Zuriñe Larena 1
- Xabier Murelaga 1
- Juan Ignacio Baceta 1
- 1 Dept. of Geology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa
ISSN: 0213-683X
Année de publication: 2023
Número: 74
Pages: 7-10
Type: Article
D'autres publications dans: Geogaceta
Résumé
This work presents the sedimentological study of the Upper Miocene-Pliocene Oko Limestones, exposed in the Antzin-Murieta Basin, in Navarre. Two stratigraphic sections of the carbonate unit have been studied: the Oko cemetery and Ega road sections. The former exposes facies that characterize a fluvial carbonate environment, with a distinct development of microbial oncolitic deposits. The coeval deposits exposed in the Ega road section, instead, largely represent a palustrine-lacustrine setting that evolved under alternating conditions of ponding and desiccation. Data integration from these sections and the intermediate areas, allows the interpretation of a fluvial to palustrine-lacustrine wetland with a marked east-southeast trend, which developed coevally to the uplift of the Piedramillera thrust sheet.