Foliations and Lineations

5/ Tectonites classification: The relative strength (ie intensity) of the planar fabric and the linear fabric is used as a qualitative criteria to classify tectonites. S-tectonites are characterized by a strong and pervasive schistosity and no lineation. S-tectonites are the result of isotropic flattening in which there is one direction of shortening and radially symmetric stretching. In SL tectonites the foliation plane carries a mineral and/or stretching lineation. Simple shear strain regime is often involved in the formation of SL tectonites. L-tectonites are characterized by a prominent lineation and a no schistosity plane. L-tectonites form when there are multiple direction of shortening and one direction of stretching.