Is wind blowing rocks together and forming smaller rocks weathering erosion or deposition?

The process of wind blowing rocks together and breaking them into smaller pieces is primarily a form of erosion. Erosion involves the wearing away and transportation of materials, while weathering refers to the breakdown of rocks without movement. Deposition occurs when eroded materials settle in a new location. In this case, the wind is actively eroding the rocks by causing them to collide and fragment.