The process of weathering, erosion, and deposition | By Harry

First weathering: weathering is when wind or water weakens rock or soil. For example, the sea wall was weakened by the wind. The wind blows the water which creates a wave and brings tiny rocks with it. The water is wearing away at the rocks. 

Over hundreds of years the rocks disappear as they become sand particles. This happens to all the rocks in the sea.

Second, erosion. We can erode the land in mines. You would find the rock or crystal and then it would go into a mine cart, travel all around the mine and go back to the start.

The wind can be very strong so it picks up dirt. The water is strong because anything that goes near it can be picked up and washed away.

Mostly dirt and sand is eroded by water or the wind. Then rocks can be deposited down a creek and end up in the sea and then they may be never found again. A delta is a rivermouth that's been building up with sand a lot. When sand builds up because it's come from somewhere else it is called deposition.