Erosion

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Erosion

  1. 1. Erosion and Deposition
  2. 2. Breaking Down Processes Weathering  The breaking down of the earth’s material by natural processes. Erosion  The process by which weathered rock and soil particles are moved from place to place. Deposition  The process by which weathered sediments are laid down in a new location creating new landforms.
  3. 3. 5 Agents of Erosion Gravity Glaciers Wind Surface Water / Running Water Ocean Shoreline / Ocean Waves
  4. 4. Gravity Pulls rock and soil down a slope  Called Mass Movement  Rapid  Rockslides  Mudflow  Avalanche
  5. 5. Gravity Slow  Slump  Creep
  6. 6. Glaciers Carry very large to very small debris Most powerful agent Deposits  Form piles called moraines  Drumlins – little mounds  Glacial lakes  Kettle lakes  U-shaped valleys
  7. 7. Moraines
  8. 8. DrumlinsGlacial lakes
  9. 9. Kettle Lakes U-shaped valleys
  10. 10. Glaciers
  11. 11. Glacial Erosion
  12. 12. Wind Removes loose material from the earth’s surface.  Amount of material carried depends on wind speed  Most active in deserts, plowed fields, beaches deserts Deposits by wind  Loess- layer of fine silt or sand  Dunes- mounds of sand
  13. 13. Loess
  14. 14. Dunes
  15. 15. Running Water MAJOR CAUSE OF EROSION  When water moves it carries particle called the load. load  Speed of water determines the size of the load  Creates canyons and valleys  River deposits  Delta  Oxbow lake  Flood plains
  16. 16. River deltas
  17. 17. Oxbow Lakes
  18. 18. Flood Plains
  19. 19. Waves Constantly erode and shape the shoreline. Formation  Sea cliffs  Sea stacks and caves
  20. 20. Sea Stacks
  21. 21. Sea Stacks & cliffs
  22. 22. CapeFlattery,OlympicPeninsula Sea caves
  23. 23. WavesDeposits  Beaches  Spits  sand bars  Barrier Islands
  24. 24. Barrier Islands
  25. 25. Spits &Sandbars
  26. 26. Erosion by Brainpop

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