Erosion
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Transcript of Erosion
Erosion and Deposition
Breaking Down Processes
Weathering The breaking downbreaking down of the earth’s material
by natural processes. Erosion
The process by which weathered rock and soil particles are movedmoved from place to place.
Deposition The process by which weathered sediments
are laid downlaid down in a new location creating new landforms.
5 Agents of Erosion
Gravity Glaciers Wind Surface Water / Running Water Ocean Shoreline / Ocean Waves
Gravity PullsPulls rock and soil down a slope
Called Mass MovementMass Movement Rapid
Rockslides Mudflow Avalanche
GravitySlow
Slump Creep
Glaciers Carry very largelarge to very smallsmall
debris Most powerful agent Deposits
Form piles called morainesmoraines Drumlins – little mounds Glacial lakes Kettle lakes U-shaped valleys
Moraines
Drumlins
Glacial lakes
Kettle Lakes
U-shaped valleys
Glaciers
Glacial Erosion
Wind Removes looseloose material from the earth’s
surface. Amount of material carried depends on wind wind
speedspeed Most active in desertsdeserts, plowed fields, beaches
Deposits by wind Loess-Loess- layer of fine silt or sand Dunes-Dunes- mounds of sand
Loess
Dunes
Running Water MAJOR CAUSE OF EROSION
When water moves it carries particle called the loadload.
SpeedSpeed of water determines the size of the load Creates canyonscanyons and valleys
River deposits Delta OxbowOxbow lake Flood plains
River deltas
Oxbow Lakes
Flood Plains
Waves Constantly erode and shapeshape the
shoreline. Formation
Sea cliffs Sea stacksstacks and caves
Sea Stacks
Sea Stacks & cliffs
Cape Flattery, Olympic Peninsula
Sea caves
Waves
Deposits Beaches Spits sand barssand bars Barrier Islands
Barrier Islands
Spits & Sandbars
Erosion by Brainpop