Serpentine
Photos
Roger Weller, geology instructor
wellerr@cochise.edu copyright 2007-R.Weller
serpentine from California-B
The presence of water in serpentine cause the
altering rock to swell,
creating cracks and slippage, eventually producing slickensides.

Photo is copyright free for non-commercial educational uses.
Just
credit photo to R.Weller/Cochise College.