The erosion produced by the Colorado River over millions of years is the sole force behind the creation of the Grand Canyon and the process continues to this day.
(The erosion; produced; by the Colorado River; T:over millions of years) (The erosion produced by the Colorado River over millions of years; is; the sole force behind the creation of the Grand Canyon) (the process; continues; T:to this day)
The erosion The erosion produced by the Colorado River over millions of years the process
produced is continues
by the Colorado River T:over millions of years
the sole force behind the creation of the Grand Canyon
T:to this day