Serpentinites

On my last road trip, I came upon an irresistible boulder of serpentinite, with the trademark roiling marble-cake texture derived from its time in the ancient California subduction zone. So I added it to the top of the Serpentinite Gallery, because it deserves the marquee position. Click through to the large version to get the full effect.

_{Serpentinite of "Earthquake Beach" — Geology Guide photo}