Before revision: upright=1.25|Tree remains that have undergone petrifaction, at Petrified Forest National Park In geology, petrifaction or petrification (from the greek word for rock, πέτρα ) is the process by which organic material becomes a fossil through the replacement of the original material and the filling of the original pore spaces with minerals.
After revision: upright=1.25|Tree remains thas seen in have undergone petrifaction, at Petrified Forest National Park In geology, petrifaction or petrification (from ) is the process by which organic material becomes a fossil through the replacement of the original material and the filling of the original pore spaces with minerals.