Plate%20Tectonics%20 - PowerPoint PPT Presentation

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Plate%20Tectonics%20

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Plate Tectonics & Mountain Building The World s Mountain Ranges Plate Tectonics Structure of the Earth Structure of the Earth Crust Mantle Core Lithosphere ... – PowerPoint PPT presentation

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Title: Plate%20Tectonics%20


1
Plate Tectonics Mountain Building
2
The Worlds Mountain Ranges
Himalayas
Rockies
Alps
Andes
Alpine-Himalayan Belt
Circum-Pacific Belt
3
Plate Tectonics
  • Structure of the Earth

4
Structure of the Earth
  • Crust
  • Mantle
  • Core
  • Lithosphere Crust Upper Mantle
  • Lower Mantle convection currents of magma

Asthenosphere
5
Plate Tectonics
  • Plates and Plate margins

6
The Worlds major Plates
North American Plate
Eurasian Plate
Plate
African Plate
Pacific Plate
Plate
South American Plate
Nazca Plate
Indo-Australian Plate
Australia
Plate
7
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

8
The lithosphere and the asthenosphere
Lithosphere
Asthenosphere
9
  • Constructive Plate Margin Oceans

Oceanic Ridge
Magma thrusts up
Rifting/faulting
Two plates move apart
10
Mid-Atlantic Ridge
Indian Ridge
11
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12
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13
? Constructive Plate Margin continent
Lava intrusion and extrusion
Plate movement
Displacement of rock strata under normal faulting
14
East African Rift Valley System
15
Oldoiyo Volcano, E. African Rift Valley
16
? Destructive Plate Margin
Sea Trench
Rising magma
Melting of crust
Two plates converge
Heavier plate squeezed down
Subduction
17
Sea Trenches
18
? Passive Plate Margin
San Andreas Fault
19
San Andreas Fault
20
Plate Margins
Ocean Floors
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