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Ductile greenschist facies shear zone in micaschsit and pegmatite. The shear zone is unusual because it contains linear, constrictional mylonites. PhotoID192

Ductile greenschist facies shear zone in micaschsit and pegmatite. The shear zone is unusual because it contains linear, constrictional mylonites. PhotoID192

Photograph: Cees Passchier