Plate Tectonics.

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Presentation transcript:

Plate Tectonics

Modern Earth

Pangea (240 mya)

Earth’s Interior

Effect of chemical differentiation

Spreading center and subduction zone

Global Tectonics Partial Melting Partial melting is responsible for evolving mantle rock… among other things this gives us continents.

Oceanic lithosphere – general chemistry is Fe, Mg rich in the form of a rock “Basalt” Continental lithosphere – general chemistry is Si, O, Al, Na, K rich…in the form of a rock “Granite”

“Ridge Push” “Slab Pull” Plate Movement “Plate Drag”

Main Types of Plate Motion Convergent Divergent Transform Main Types of Plate Motion

Five types of plate boundaries Divergent Transform Convergent Ocean-Ocean Ocean-Continent Continent-Continent

Five types of plate boundaries Divergent Transform Convergent Ocean-Ocean Ocean-Continent Continent-Continent

Divergent Boundary

Convergent Boundary

Transform Boundary

Hot Spot

Origin of India and the Himalayan mountains

The Rock Cycle

Igneous Rocks

Sedimentary Rocks

Metamorphic Rocks

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