This 225-million-year-old ‘stone wood’ in Arizona is more valuable than gold |
In Arizona’s dry, rugged badlands, you can find something far more valuable than any glittering gold: the Petrified Forest. These aren’t just old trees; they’re stone ones, dating back around 225 million years to the Late Triassic period. It happened because of a special chemical change, where volcanic ash and groundwater, full of silica, gradually…
