Opposite fault
In Geology, a opposite Faille is a tilted plan (generally of approximately 30°) separating two rock compartments. The slip from this point of view results by the bringing together of the two compartments and the rising of the top chamber compared to the lower compartment. This relative movement adapts a horizontal shortening. The specificity of the faults opposite is that they cause an abnormal superposition and a redoubling of the sedimentary layers.
Tectonic context
the faults opposite (also called Overlapping S when they are very slightly tilted) characterize a compressive deformation. They are thus in general in the areas of the sphere where the Plate tectonics induces a relative convergence. That can occur in edge of plates, as in a zone of Subduction and the associated Prisme of accretion, or within the continental crust, as in the assembly lines, which result from the Collision and the bringing together of two tectonic plates. They are besides the faults opposite and Chevauchement S which is there at the origin of the thickening of the crust and the construction of the chain.
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