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

Erosion and Deposition


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


Mass wasting

Mass Wasting


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


Erosion and deposition

Moraines


Erosion and deposition

Drumlins

Glacial lakes


Erosion and deposition

Kettle Lakes

U-shaped valleys


Erosion and deposition

Glaciers


Glacial erosion

Glacial Erosion


Erosion and deposition

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


Erosion and deposition

Loess


Erosion and deposition

Dunes


Wind erosion

Wind Erosion


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


Erosion and deposition

River deltas


Erosion and deposition

Oxbow Lakes


Erosion and deposition

Flood Plains


Waves

Waves

  • Constantly erode and shape the shoreline.

  • Formation

    • Sea cliffs

    • Sea stacks and caves


Erosion and deposition

Sea Stacks


Erosion and deposition

Sea Stacks & cliffs


Erosion and deposition

Cape Flattery, Olympic Peninsula

Sea caves


Waves1

Waves

Deposits

  • Beaches

  • Spits

  • sand bars

  • Barrier Islands


Barrier islands

Barrier Islands


Spits sandbars

Spits & Sandbars


Erosion by brainpop

Erosion by Brainpop


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