Erosion and deposition
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Erosion and Deposition. 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

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Erosion and Deposition

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Erosion and Deposition


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.


5 Agents of Erosion

  • Gravity

  • Glaciers

  • Wind

  • Surface Water / Running Water

  • Ocean Shoreline / Ocean Waves


Gravity

  • Pulls rock and soil down a slope

    • Called Mass Movement

      • Rapid

        • Rockslides

        • Mudflow

        • Avalanche


Gravity

Slow

  • Slump

  • Creep


Mass Wasting


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


Moraines


Drumlins

Glacial lakes


Kettle Lakes

U-shaped valleys


Glaciers


Glacial Erosion


Wind

  • Removes loose material from the earth’s surface.

    • Amount of material carried depends on wind speed

    • Most active in deserts, plowed fields, beaches

  • Deposits by wind

    • Loess- layer of fine silt or sand

    • Dunes- mounds of sand


Loess


Dunes


Wind Erosion


Running Water

  • MAJOR CAUSE OF EROSION

    • When water moves it carries particle called the load.

      • Speed of water determines the size of the load

      • Creates canyons and valleys

    • River deposits

      • Delta

      • Oxbow lake

      • Flood plains


River deltas


Oxbow Lakes


Flood Plains


Waves

  • Constantly erode and shape the shoreline.

  • Formation

    • Sea cliffs

    • Sea stacks and caves


Sea Stacks


Sea Stacks & cliffs


Cape Flattery, Olympic Peninsula

Sea caves


Waves

Deposits

  • Beaches

  • Spits

  • sand bars

  • Barrier Islands


Barrier Islands


Spits & Sandbars


Erosion by Brainpop


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