Answer
An accretionary wedge is a geological feature formed at convergent plate boundaries where an oceanic plate is subducting beneath a continental plate. As the oceanic plate descends into the mantle, sediments and rocks accumulate at the subduction zone due to the intense forces and friction. These sediments and rocks get scraped off the oceanic plate and accrete onto the edge of the overriding continental plate, forming a wedge-shaped pile of material. The accretionary wedge contains a mixture of materials, including marine sediments, volcanic rocks, and sometimes pieces of oceanic crust, and it contributes to the growth of continental margins.
Work Step by Step
Refer to the above answer.
