Complex sentence: Features analogous to trenches are associated with collisions zones; these are sediment-filled foredeeps, referred to as peripheral foreland basins, such as those which the Ganges River and Tigris-Euphrates rivers flow along.
Split into simpler sentences: Features analogous to trenches are associated with collisions zones. These are sediment-filled foredeeps, referred to as peripheral foreland basins, such as those the Ganges River and Tigris-Euphrates rivers flow along.