"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 ...
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 ...
Grand Canyon National Park was named an International ... pointing out the similar ages of certain visible stars and the rock layers in the canyon. “You can look up at a star and say, that ...
Around 400 seventh grade students from American Fork Junior High School ended up stumbling upon Thursday’s grand ... layers. “We didn’t know there was an event here today. We come to Rock ...