These rocks preserve a remarkably complete record of the microstructural and thermobaric evolution of the GHS and bear directly on the tectonothermal history of rocks incorporated into the MCT zone during mylonitization.
These new data support an interpretation whereby the locus of mylonitization in the MCT zone propagated southward into progressively cooler crustal material.
The DPDZ steep shearing, occurring during the retrograde stage of metamorphism, indicates an extensional kinematics of the mylonitization
of the rocks at Prague fault zone indicates former tectonic movements (Kriz, 1999).
The partial overthrust accompanied by mylonitization
or/and boudinage exists in individual slices as well.
There was also widespread mylonitization
and alteration of biotite in the Cape Chignecto pluton at about this time (Nearing et al.