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Plate Tectonics &
Mountain Building
The World’s Mountain
Ranges
Himalayas
Rockies
Alps
Andes
Alpine-Himalayan Belt
Circum-Pacific
Belt
Plate Tectonics
Structure of the Earth
Structure of the Earth
Crust
Mantle
Core
Lithosphere = Crust + Upper
Mantle
Asthenosphe
 re
Lower Mantle : convection
currents of
magma




Plate Tectonics
Plates and Plate margins
The World’s major Plates
North
American
Plate
Eurasian Plate
Africa
n Plate
Plate
Plate
IndoAustralia
Australian
Plate
Plate
Pacific
Plate
South
American
Nazca Plate
Plate
Plates movements & Plate margins
How do the plates move?

Diverging; Converging; lateral
movement
Plate margins:
 Diverging/Constructive plate margin
 Converging/Destructive plate margin
 Conservative/Passive plate margin
The lithosphere and the asthenosphere
Lithosphere
Asthenosphere
 Constructive Plate Margin :
Oceans
Magma
thrusts
up
Oceanic
Ridge
Rifting/faulting
Mid-Atlantic
Ridge
Indian
Ridge
 Constructive Plate Margin:
continent
Lava intrusion
and extrusion
Plate movement
Displacement of rock strata under normal
faulting
East African Rift Valley
System
Oldoiyo Volcano, E. African Rift
Valley
 Destructive Plate
Margin
Sea
Trench
Rising
magma
Melting
of crust
Sea
Trenches
 Passive Plate
Margin
San Andrea’s
Fault
San
Andrea’s
Fault
Plate Margins & Ocean
Floors
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