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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Breaking down processes
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
5 Agents of Erosion

  • Gravity

  • Glaciers

  • Wind

  • Surface Water / Running Water

  • Ocean Shoreline / Ocean Waves


Gravity
Gravity

  • Pulls rock and soil down a slope

    • Called Mass Movement

      • Rapid

        • Rockslides

        • Mudflow

        • Avalanche


Gravity1
Gravity

Slow

  • Slump

  • Creep



Glaciers
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



Drumlins

Glacial lakes


Kettle Lakes

U-shaped valleys




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





Running water
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





Waves
Waves

  • Constantly erode and shape the shoreline.

  • Formation

    • Sea cliffs

    • Sea stacks and caves





Waves1
Waves

Deposits

  • Beaches

  • Spits

  • sand bars

  • Barrier Islands



Spits sandbars
Spits & Sandbars



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