Répartition des foraminifères benthiques dans les gisements de surface du Miocè...

• Author(s): Cahuzac, B. ; Poignant, A.
• Date: 1992
• Persistent ID: http://hdl.handle.net/10362/4517
• Origin: Repositório Institucional da UNL
• Subject(s): Benthic foraminifera; Aquitaine basin (southwestem France); Late Oligocene; Miocene; stratigraphy
• Document Type: Article
• Language: French

Description

The Aquitaine Basin (southwestem France) is known since long ago for its richness in marine miocene deposits ofvarious facies. A few stratotypes concerning this period have bccn described in the investigated area. The stratigraphical framework has becn recently revised and the study of new exposures completes our knowledge on these levels. In the present work, the authors produce a biostratigraphical distribution of about 160 species (Iarger and smaller foraminifera), found in the surface exposures of Aquitaine, from the topmost Oligocene (Chattian) through to Middle Miocene (including Serravallian). As a rule, the common species without significant ranges have not bcen mentioned. The microfaunas of several exposures have been thoroughly revised, which has allowcd to precise the distribution of many species and induced a few modifications of the results previously produced. Synonymy problems and new taxonomical revisions have been taken into account. Of course, this work will be probably submitted to some changes according to new research on the already known exposures or other more recently discovered.