Trees once covered the banks of big rivers in this area, 225 million years ago. When they fell over, the river washed them into the floodplain and silt, mud and volcanic ash covered them. Cut of from oxygen, Silica-laden groundwater seeped through the logs and replaced the organic matter with silica. The silica crystallized into quartz and a petrified forest was born.
Stones in the form of tree logs.
Add some minerals and you have fancy colours.
Good to see once in your life, but boring at the same time.Iris (Petrified Forest NP, 38040 miles)
