The Petrified Dunes: Nature’s Time Capsules Frozen in Stone
Petrified dunes are formed when sand dunes become fossilized over long periods of time. This occurs when the dunes are buried under sediment that hardens into rock. The most famous examples are found in Arizona’s Petrified Forest National Park. The park contains deposits of petrified wood and fossilized sand dunes that are over 200 million … Read more