Above: The Grand Canyon was formed by hundreds of millions of years of sediment deposition under a wide variety of conditions, followed by millions of years of erosion by the Colorado River.
(The Grand Canyon; was formed; by hundreds of millions of years of sediment deposition) (a wide variety of conditions; followed; by millions of years of erosion by the Colorado River)
The Grand Canyon a wide variety of conditions
was formed followed
by hundreds of millions of years of sediment deposition
by millions of years of erosion by the Colorado River