Sediment eroded from the newly uplifted ancestral Rocky Mountains was deposited in this area by a large system of rivers.
(Sediment; eroded; from the newly uplifted ancestral Rocky Mountains) (Sediment eroded from the newly uplifted ancestral Rocky Mountains; was deposited; in this area; by a large system of rivers)
Sediment Sediment eroded from the newly uplifted ancestral Rocky Mountains
eroded was deposited
from the newly uplifted ancestral Rocky Mountains
in this area by a large system of rivers