Complex sentence: This mass is then accreted or stuck to the non-subducting plate to form an accretionary wedge.THe material in the accretionary wedge usually consosts of marine sediments as well a rock gathered by the oceanic plate.
Split into simpler sentences: This mass is then accreted or stuck to the non-subducting plate to form an accretionary wedge. The material in the accretionary wedge usually consists of marine sediments as well as rock gathered by the oceanic plate.