Jeff Moore
Media playback is unsupported on your device
Video

Spectacular landslide shaped Zion Canyon

US scientists have produced their most precise date yet for the colossal landslide that helped shape the big red canyon running through what is now Zion National Park.

Jeff Moore form the University of Utah spoke with our correspondent Jonathan Amos.

Go to next video: Watch a 5,000-year-old giant landslide unfold