Field photograph of extensional shear bands in highly deformed greenschist-facies sediments of a crustal-scale extensional shear zone (Menderes Massif, SW Turkey). Shear sense is dextral. Coin is 3 cm ...

TALC is a metamorphic and hydrothermal mineral which is found typically in the greenschist facies of metamorphic rocks, and in shear zones where it is an alteration product. Talc has recently been ...