This chapter is based on detailed field surveys performed in the 1980s by the Ecole Nationale Supérieure du Pétrole et des Moteurs (ENSPM) and the Institut Français du Pétrole (IFP) in the southern French Alps Paleogene basin. In this basin, the so-called Priabonian trilogy (Nummulitic Limestone-Blue Marls-Annot Sandstone) is well developed and represents (with the uppermost olistostrome) a complete sedimentary cycle.Understanding gained about the sedimentary infilling of the basin enables us to reconstruct the major outlines of the sedimentary thickness, the paleotopography of the basin, as well as the paleobathymetries of these deposits. These parameters are indispensable for computing the subsidence of a basin.We can affirm that the hypothesis of a flexural origin (internal tectonic overloading) is plausible from the mechanical and geological standpoints. A new schematic reconstruction of the paleogene basin is proposed in which the “cordilleras” are the emerged part of more internal overthrusting structures.
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- The Southern French Alps Paleogene Basin: Subsidence Modeling and Geodynamic Implications
- Springer Berlin Heidelberg