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Erosion

Erosion. Natural removal of sediment from an area. Agents of Erosion. Gravity Water ( Running Water) Waves (Beach Erosion) Ice (Glaciers) Wind. Gravity Erosion. Landslide-down slope movement of rock or sediment. "Slumping“-Rapid Movement. "Surface creep“- Slow Movement.

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Erosion

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  1. Erosion Natural removal of sediment from an area.

  2. Agents of Erosion • Gravity • Water (Running Water) • Waves (Beach Erosion) • Ice (Glaciers) • Wind

  3. Gravity Erosion • Landslide-down slope movement of rock or sediment. • "Slumping“-Rapid Movement. • "Surface creep“- Slow Movement

  4. Main Factors of Running Water Erosion • Amount/Intensity of Precipitation • Soil Texture • Slope • Ground Cover

  5. Water Erosion • Gullies, streams and rivers carry sediment down river. • Speed affect’s ability of waterto erode. • Factors that affect speed. • Slope. • Volume. • Shape of Channel.

  6. Parts of a River • Headwaters- Steep slope, fast water. • Downriver-Tributaries increase volume, not as steep. • Flood Plain-Rivers meander. Speed determined by floodplain. • Mouth-Speed is slowest. Eroded sediment is deposited at delta.

  7. Parts of a River

  8. Shoreline Erosion • Occurs through action of currents and waves. • Occurs when waves hit a cliff and a rock breaks off. • “Longshore drift” is sand that is moved along the coast by the current.

  9. Ice Erosion • As glaciers scrape down slopes, they break up rock and transport it.

  10. Wind Erosion • Movement of sediment by wind. The wind causes dust particles to be lifted up and moved. • Occurs in areas with little or no vegetation.

  11. Wind Erosion • An example is the formation of sand dunes on a beach or in a desert. • Farmers often plant windbreaks to reduce wind erosion. This includes the planting of trees, or shrubs perpendicular to the prevailing wind direction.

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