Title: Plate%20Tectonics%20
1Plate Tectonics Mountain Building
2The Worlds Mountain Ranges
Himalayas
Rockies
Alps
Andes
Alpine-Himalayan Belt
Circum-Pacific Belt
3Plate Tectonics
4Structure of the Earth
- Crust
- Mantle
- Core
- Lithosphere Crust Upper Mantle
- Lower Mantle convection currents of magma
Asthenosphere
5Plate Tectonics
6The Worlds major Plates
North American Plate
Eurasian Plate
Plate
African Plate
Pacific Plate
Plate
South American Plate
Nazca Plate
Indo-Australian Plate
Australia
Plate
7Plates 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
8The lithosphere and the asthenosphere
Lithosphere
Asthenosphere
9- Constructive Plate Margin Oceans
Oceanic Ridge
Magma thrusts up
Rifting/faulting
Two plates move apart
10Mid-Atlantic Ridge
Indian Ridge
11(No Transcript)
12(No Transcript)
13? Constructive Plate Margin continent
Lava intrusion and extrusion
Plate movement
Displacement of rock strata under normal faulting
14East African Rift Valley System
15Oldoiyo Volcano, E. African Rift Valley
16? Destructive Plate Margin
Sea Trench
Rising magma
Melting of crust
Two plates converge
Heavier plate squeezed down
Subduction
17Sea Trenches
18? Passive Plate Margin
San Andreas Fault
19San Andreas Fault
20Plate Margins
Ocean Floors