Tectonite

Tectonites are metamorphic or tectonically deformed rocks whose fabric reflects the history of their deformation, or rocks with fabric that clearly displays coordinated geometric features that indicate continuous solid (ductile) flow during formation.

Planar foliation results from a parallel orientation of platey mineral phases such as the phyllosilicates or graphite.

[1] Tectonites are rocks with minerals that have been affected by natural forces of the earth, which allowed their orientations to change.

Tectonites are studied through structural analysis and allows for the determination of two things:[2] According to the nature of mineral orientation, there are three main groups of tectonites, L-Tectonites, S-Tectonites, and LS-Tectonites.

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