The transported sediments themselves have tremendous erosive power and they contribute to the formation of canyons by abrading and scouring drainages.
(The transported sediments; have; tremendous erosive power) (they; contribute; to the formation of canyons by abrading and scouring drainages)
The transported sediments they
have contribute
tremendous erosive power
to the formation of canyons by abrading and scouring drainages