"Scroll Down through History" displays the layers of rock exposed within the Grand Canyon and shows when in earth's history they formed. The region where the Grand Canyon now lies begins to shift ...

The Grand Canyon was carved out of rock by the Colorado River over millions of years. The strata of the canyon is discussed to explain what the layers tell us about how the canyon formed.

The Grand Canyon is the biggest canyon on earth: 277 miles long, 10 miles wide, and a mile deep. It contains some of the oldest exposed rock on earth, Precambrian Vishnu schist, formed 1.7 billion ...

Formed over thousands of years of erosion caused by hydrothermal activity, water and other natural forces, the Grand Canyon ... of the canyon, including its many colors and rock formations.

Our family just returned from our first visit to the Grand Canyon and let me tell ... colors shift with the light, the layers of history etched into the rock, the kind of silence that feels ...

A variety of companies offer helicopter tours of the Grand Canyon ... you'll take in epic views of the canyon's rock formations before descending past the glittering lights of Vegas and its ...