Shear zones.
Planetary Geology (Chapter 9) Part of Chapter 9: General Processes Affecting the Terrestrial Planets (and the Moon)
Metamorphic Rocks
Earth Structure. CRUST MANTLE CORE MANTLE CORE CRUST CONTINENTAL CRUST OCEANIC CRUST Peridotite (olivine & augite) Mohorovivic Discontinuity (Moho)
Rheology of the Lower Crust and Upper Mantle: Evidence from Rock Mechanics, Geodesy, and Field Observations Roland Burgmann and Georg Dresen.