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Waves and Wind
Transcript of Waves and Wind
By Gloria, Hayden, and Olandis
Deposition by Wind
Erosion by Wind
Weakest form of erosion
Wind causes erosion by deflation and abrasion
Deflation- the process by which wind removes surface materials
Main way wind causes erosion
Wind picks up sediment and moves it
Deflation doesn't have much effect on land
Abrasion- when sand picked up by wind polishes rock, but doesn't really do any erosion
It used to be believed that abrasion caused desert landforms
Energy in waves come from wind that blows across the waters surface.
A wave changes as it approaches the land.
Forward moving water provides force that shapes the land.
Deposits By Waves
Erosion by Waves
How Waves Form
Erosion by Wave
How waves form
Deposits by wave
Erosion by wind
Deposits by wind
Beaches, spits, sandbars, and barrier beaches are created by waves
Wave-cut cliff, sea cave, sea arch, headland, stack, and stamp are forms of erosion by waves.
Sand Dunes- sand comes in many shapes and sizes by wind
Some are long, with parallel ridges, while others are U-shaped
They move over time little by little
The sand shifts with the wind from one side of dune to the other
Loess Deposits-particles of clay and silt, that is deposited in layers far from its source.
It helps to form fertile soil.
Many areas with thick loess deposits are valuable farmland.
All sediment picked up by wind eventually falls to the ground.
happens when the wind slows down or some obstacle
They may form sand dunes and loose deposits.
Spits- a narrow point of land going into the ocean
Sandbars- a long narrow sand bank
Barrier Beaches- a sand ridge that rises slightly above the ocean