Erosion and Weathering

Erosion and Weathering
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What is erosion?
(geology) the mechanical process of wearing or grinding something down (as by particles washing over it)

The wearing away of the earth’s surface by natural processes

corrosion: erosion by chemical action
Types of Erosion
Water
Wind
Glacier
Soil
Sea
Wind
The wind picks up smaller particles of rock (pebbles and sand)

These hit landforms and take pieces off them

This friction causes the break up of landforms
Glacier Erosion
What is a GLACIER?:
A huge mass of ice slowly flowing over a land mass, formed from compacted snow in an area where snow accumulation exceeds melting
These large bodies of ice that pick up rocks and earth and erode the earth’s surface
Powerful eroding machine, picking up pieces of rock the size of houses in some places
Glaciers are so powerful they can carve valleys and create landforms
Glacier Erosion
What is a GLACIER?:
A huge mass of ice slowly flowing over a land mass, formed from compacted snow in an area where snow accumulation exceeds melting
These large bodies of ice that pick up rocks and earth and erode the earth’s surface
Powerful eroding machine, picking up pieces of rock the size of houses in some places
Glaciers are so powerful they can carve valleys and create landforms
Sea Erosion
Salts and other chemicals in the water erode coastal rocks

These are dragged out to sea and deposited in other areas (Long shore Drift)

Wave power creates erosion. Also particles of rock and sediment aid to the erosion process
Soil Erosion
Biggest problem for farmers

Wind and rain remove topsoil and nutrients

Makes the soil infertile and it breaks up leaving dongas