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TYPES OF EROSION © Copyright 2004 - 2005. M. J. Krech. All rights reserved.
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TYPES OF EROSION
© Copyright 2004 - 2005. M. J. Krech. All rights reserved.
WHAT ISEROSION?
Erosion is the movement of weathered rocks and soil particles from one place to another.
THERE ARE FIVE AGENTS OF EROSION.
• GRAVITY• GLACIERS• WIND • WATER• WAVES
GRAVITY
EROSION CAUSED BY GRAVITY IS CALLED
MASS WASTING.
RAPID MASS WASTING
One type of rapid mass wasting is
LANDSLIDE
which is the tumbling of dry soil and rocks downhill
RAPID MASS WASTING
Another type is
MUDFLOW
where rain mixes with the soil to form mud which moves downhill
RAPID MASS WASTING
Another type is
SLUMP
where a huge block of rock slides rapidly down a hillside.
SLOW MASS WASTING
One type of slow mass wasting is
EARTHFLOW
where a mass of soil and plant life begin to slowly move downhill after a heavy rain.
SLOW MASS WASTING
Another type is
CREEP
where soil particles move slowly downhill.
This is the slowest.
GLACIERS
A
GLACIER
is a large mass of moving ice and snow.
GLACIERS
Glaciers move rocks by
PLUCKING
where ice freezes around a rock and moves it along as the glacier moves.
GLACIERS
Glaciers also move rocks by
ABRASION
where rocks are loosened and moved by the glacier, causing scratches on the bedrock.
WIND
Wind moves soil by
DEFLATION
where wind removes loose material from the land.
Here smaller sand grains are blown away from around larger rocks.
WATER
Running water is the major cause of erosion.
Water picks up and carries loose particles of soil as it moves downhill.
WATER
Water starts out in tiny grooves called
RILLS
WATER
Rills become wider and deeper,
called
GULLIES
WATER
Gullies turn into
STREAMS
which turn into
RIVERS.
WAVES
Waves carry off small rocks and sand from the beach.
EROSION
What is the agent of erosion in this picture?
A.
EROSION
What is the agent of erosion in this picture?
B.
EROSION
What is the agent of erosion in this picture?
C.
EROSION
What is the agent of erosion in this picture?
D.
EROSION
What is the agent of erosion in this picture?
E.
THE END
F.BONUS:List at least three types oferosion inthis pictureand how youknow.
© Copyright 2004 - 2005. M. J. Krech. All rights reserved.
