Abstract

In the south-east border of French Central Massif, near Anduze, limestone series of Upper Jurassic age are affected by an association of deformations which occurred during a single tectonic phase. Thus chronologically appeared: 1. (1) Conjugated shear planes with vertical intersection (dextral and sinistral microdisplacement). 2. (2) Concentric folds with approximately east-west axis trend associated with stylolitic joints. 3. (3) Conjugated shear planes with horizontal intersections (microthrusts to north or south). The study of these different deformations gives way to the reconstitution of both successive states of stress during time and local variations in direction of the stress ellipsoid axis.

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