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Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion.

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Page 1: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

Erosion!

Once a rock is weathered, it usually moves from one place to another.

This process is called erosion.

Page 2: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

Erosion is caused by the following:

a. gravity

b. running water

c. glaciers

d. waves

e. wind

Page 3: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

Gravity

This is the force that moves rocks and other materials downhill.

Gravity causes mass movement - when a WHOLE lot of materials move downhill at once.

Different types of mass movement include:

a. landslidesb. mudslidesc. slumpd. creep

Page 4: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

Landslides

The most destructive kind of mass movementOccurs when rock and soil slide quickly down a steep slopeCommon where road builders have cut through hills or mountains.

Page 5: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 6: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

Mudflows

Rapid downhill movement of mixture of water, rock, and soilOften occur after heavy rains in a normally dry areaCan be deadly!

Page 7: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 8: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 9: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

Slump

mass of rock and soil suddenly slips down a slope in one large mass

Creepvery slow downhill movement of rock and soil. so slow you barely notice it.may tilt objects at spooky angles (like tombstones, fence posts)

Page 10: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

Slump

Page 11: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 12: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

Creep

Page 13: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

Moving water is the major agent of the erosion that has shaped the Earth's surface.

There are several ways the water erodes material:

a. Gravity and rain b. Rivers

c. Groundwater

Page 14: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

Gravity and Rain

Rain that doesn't soak into the ground, is runoffAs runoff travels across the ground, it forms tiny grooves in the soil called rillsRills flow into each other, growing larger and forming gulliesRills and gullies carry soil and rock away from an area.Gullies only flow after it rains.

Page 15: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 16: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

Through erosion, a river creates:

a. valleysb. waterfallsc. flood plainsd. meanderse. oxbow lakes

Page 17: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 18: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 19: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

When rain falls and snow melts, some of the water soaks into the ground

Causes erosion through chemical weathering

Water and carbon dioxide combine to from a weak acid that breaks down limestone

Over time, pockets are hollowed out underground and caves form.Karst topography

Groundwater

Page 20: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

Karst Topography

Page 21: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 22: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 23: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 24: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 25: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 26: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 27: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 28: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 29: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 30: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

Waves

Water is an extremely strong force

As it continually pounds the land, it actually causes the rock and soil to break apart, then be carried away

Page 31: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 32: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 33: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion
Page 34: Erosion! Once a rock is weathered, it usually moves from one place to another. This process is called erosion

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