composition surface

A twin boundary or composition surface separates the two crystals.

Contact twins share a single composition surface often appearing as mirror images across the boundary.

He guided it back onto the road, feeling the rear end fishtail for a moment before regaining the composition surface.

The Princess nosed up onto the pavement, which was not asphalt but a smooth composition surface without a patch or expansion-joint to be seen.

He collapsed on the composition surface and the screaming sound of brakes and tires filled the world as he waited numbly to be run over.

It barked joyously at the sight of Stu and ran up the road, toenails clicking on the composition surface, tail wagging frantically back and forth.