The rock is ancient, and so are the traces ... stepping its way shelf by shelf down to the Grand Canyon and beyond. The Paria Plateau and its hem of cliffs were named a national monument by ...

"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 ...

This includes the following creeks, washes and rivers: Rock Canyon ... include Paria Canyon, Paria River Slot Canyon, Glen Canyon National Recreation Area, Grand Canyon National Park, Vermilion ...

Some rock scrambling ... are taken into the Grand Canyon. They are so much bigger than we really thought they were. The ...