Listen to Grand Canyon National Park Ranger Bil Vandergraff talk about rangering below
the rim of the canyon. (Duration: 2:08 - mp3 file)
Listen to Grand Canyon National Park Ranger Anne Petersen talk about rangering below
the rim of the canyon. (Duration: 1:08 - mp3 file)
Did You Know?
In Grand Canyon, the broad, sandy expanse on the north bank of the Colorado River is Unkar Delta, composed of rock debris carried from the North Rim by Unkar Creek. Prehistoric Pueblo people occupied numerous sites on Unkar Delta and along Unkar Creek for about 350 years (A.D. 850 to A.D. 1200)