"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 rock layers at the Grand Canyon are a record book containing records ... Researchers use satellite photos, ground-penetrating radar, and 3D mapping to analyze rock formations in detail.

And the Grand Canyon reveals undreamt-of views into deep chasms and gorges gorges that were gradually cut into the rock of the Colorado ... inhabitants in perfect 3D. This film was made by a ...

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.