In contrast, the paleostress tensors of the second group of structures show σ1 orientations parallel or at a low angle with respect to local structural trends. Analysis of fault-slip data reveals that the first group is related to σ1 perpendicular to the surface traces of thrusts and/or fold axes, and are therefore compressive structures. A second group of structures accommodate contraction superposed on the previous group. One group of structures trend parallel to the recess and verge either towards the foreland or towards the hinterland. A detailed study of the structure of the Península Mitre recess in the Fuegian thrust-fold belt of southern Argentina reveals superposed deformation related to contrasting shortening directions.
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