Petrified Forest National Park, AZ

An amazing visit to a very special National Park. Still hard to believe these wooden logs from 200 million years ago have stoned to stone.

Over 200 million years ago, the logs washed into an ancient river system and were buried quick enough and deep enough by massive amounts of sediment and debris also carried in the water, that oxygen was cut off and decay slowed to a process that would now take centuries.

Minerals, including silica dissolved from volcanic ash, absorbed into the porous wood over hundreds and thousands of years crystallized within the cellular structure, replacing the organic material as it broke down over time. Sometimes crushing or decay left cracks in the logs. Here large jewel-like crystals of clear quartz, purple amethyst, yellow citrine, and smoky quartz formed.
Wood turns to Stone. It does take 217 million years.
Collared Lizard (Crotaphytus collaris). Female to the left and Male to the right.
Agate House. Reconstruction of a pueblo house that was built and occupied sometime between 1050 and 1300
Agate House constructed from Petrified Wood, which is 217 millions years old.
Crystal Forest
Erosion of the soft aggregate exposes the petrified logs.
Blue Mesa Badlands
Petroglyphs at the Summer Solstice Marker