Figure 13. Western tectonic contact of the same body. Photo: A. V. Chistyakov. (A) General view of the contact: left--migmatites (light), right--olivine gabbronorites. The migmatites and gabbronorites are separated with an amphibolization zone affected by partial migmatization. (B) Bending of the primary layering along the tectonic contact zone. The bottom part of the photo demonstrates that the layered rocks are transformed into deformed blastomylonites (amphibolites). The detachment fault surface is marked by a vein of granitic material.