Roger Weller, geology instructor
petrified wood-drift wood-2
The darker specimen is a recent piece of driftwood picked up on the Pacific
shoreline in Oregon. The lighter colored specimen is a piece of driftwood that
was silicified after the wood had been reduced to driftwood (also from Oregon).
Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.