Answer:
Subduction of 'oceanic lithosphere' at the trenches can act like a 'bulldozer' to produce an accretionary wedge.
Step-by-step explanation:
- The action of subduction subsequently results in a gradual layering up of material on 'both sides of the plate'.
- This process of layering up of the material from the plates is called as accretion.
- When a lighter plate undergoes subduction, it not only subducts but also lifts up the other plate to a certain extent.
- This action directly results in the formation of an 'accretionary wedge'.