Abstract

Discusses the stratigraphy and paleogeography of the Brianconnais zone in the vicinity of Briancon, France, particularly during the geanticlinal period (upper Triassic to lower Eocene). The geanticline was formed by a pre-Bathonian "pulsation" rather than by marked orogeny; its relief was always very low, and erosion and sedimentation were consequently weak. There were areas, not only at the western margin, but even in the axial and eastern portions of the Brianconnais zone, where sedimentation was continuous from the Callovian (Jurassic) to the upper Cretaceous or later; the stratigraphic breaks usually considered characteristic of the Brianconnais facies are lacking.

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