Erosion and Deposition Ch. 7 Sec. 3 Erosion and Deposition

Erosion Transports materials from one place to another Streams and rivers Glaciers Wind Ocean Currents When the erosion process slows down, materials dropped in another location: Deposition

Gravity’s Role Gravity pulls erosional agents down slope Rivers need to flow Landslides and glacial movement follow gravity

Erosion: Running Water Greatest when large volumes of water is moving rapidly Higher to lower elevations Smaller streams flow to larger streams System is known as a watershed

Erosion: Running Water Rill Erosion Running water in small channels on a side of a slope

Erosion: Running Water Gully Erosion Channels that becomes deep & wide Can be more than 3 m deep Major problem for farming and grazing areas

Coastal Deposition and Erosion Each year, streams & rivers carry billions of metric tons of sediments to coastal areas River flows into the ocean and water slows Build up of the sediments known as Deltas

Coastal Deposition and Erosion Ocean waves and tides erode the coastal areas Dunes and beaches form as a result from the accumulating particles

Glacial Erosion Large scale and dramatic So large they carry huge rock piles and debris over great distances Many lakes and waterfalls are products of glacial movement

Wind Erosion Wind can easily transport fine, dry materials Abrasive action of wind-blown particles can be damaging Death Valley Wind barriers can help reduce damage: trees