shear-structure

from The Century Dictionary.

• noun In geology, a structure superinduced in rocks by shearing; a structure varying from lamellar to schistose, somewhat resembling the so-called “fluxion-structure” often seen in volcanic rocks, but produced by the flowing, not of molten, but of solid material, as one of the consequences of the immense strain by which the upheaval or plication of large masses of rock has been accompanied.