Over millions of years, the Colorado River carried weathered sediments away until the mile-deep canyon was created as we know it today.
(the Colorado River; carried; weathered sediments; away; T:Over millions of years) (the mile-deep canyon; was created; T:as we know it today) (we; know; it; T:today)
the Colorado River the mile-deep canyon we
carried was created know
weathered sediments away T:Over millions of years
T:as we know it today
it T:today