Los macroforammiferos del Coniaciense superior-Santoniense inferior de la Sierra del Montsec (Pirineos, NE de España)distribución estratigráfica y paleoambiental
- Carme Boix 1
- JosepM. Bernaus 2
- E. Caus 1
- 1 Departament de Geología (Paleontología), Universität Autónoma de Barcelona
- 2 Oolithica Geoscience Limited
ISSN: 1576-5172
Année de publication: 2004
Titre de la publication: IV Congreso Geológico de España
Número: 6
Pages: 279-282
Type: Article
D'autres publications dans: Geotemas (Madrid)
Résumé
The Upper Coniacian-Lower Santonian sediments form the Montsec Mountains (Pyrenees, NE Spain) constitute a complete cycle of sedimentation, bounded by erosional surfaces. Within this cycle two complex bar-lagoon systems were identified. Both systems are characterised by one or several bars that separated the open sea from a well developped lagoon colonised by abundant and diversified Larger Foraminifera. Sediments from more external areas deposited in the lagoon (tidal delta and washover deposits) are poor in Larger Foraminifera and/or they are completely broken. From biostratigraphical point of view, the larger agglutinated foraminifera, complex miliolids and canaliculate lamellar perforated rotalids indicate a cycle of global community maduration.