"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, located in Arizona, USA, is one of the most iconic natural wonders in the world. Carved over millions of ...

A trace of the mountains still exists in the Vishnu Basement Rocks, the base layer of rock that is located at the lowest part of the Grand Canyon today. Directly on top sit several other layers of ...

LIZ BONNIN: So those layers of rock are really a bit like the rings on a section of a tree trunk. Both giving a visible indication of how old they are. Liz Bonnin introduces the Grand Canyon with ...