“Do you have any rocks or minerals in the car with you?” asked the park ranger. “Yes, a geode and piece of petrified wood that we purchased at the gift shop,” my father said. “Is it wrapped up?” asked ...

Petrified wood is a fossil that is the remains of ancient vegetation, most commonly ancient trees. It occurs by a natural action known as permineralization, a process in which mineral deposits take on ...

The Petrified Forest National Park is Arizona's least visited national park. I stopped at the park on a recent road trip across America's Southwest. I discovered colorful fossilized logs, uncovered ...

In the U.S., many states have an official state fossil, or even a designated state dinosaur. Some states recognize an official dinosaur in celebration of the specific region's paleontology, and others ...