Weathering, erosion, and deposition are processes that act together to wear down and build up the Earth's surface. These processes have occurred over billions of years.
Deposition
Deposition occurs when the agents (wind or water) of erosion lay down sediment into new areas. Deposition is a constructive process that changes the shape of the land.
Delta FormationDeltas are wetlands that form as rivers empty their water and sediment into another body of water, such as an ocean, lake, or another river. A river moves more slowly as it nears its mouth, or end. This causes sediment carried downstream by currents, to fall to the river bottom eventually creating new landforms.
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Weathering, Erosion, and Deposition
Topic Tip
- Deposition is the dumping of sediment into a new location creating new land-forms.