Three Types of Plate Boundaries Divergent Convergent Transform or strike/slip.
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Transcript of Three Types of Plate Boundaries Divergent Convergent Transform or strike/slip.
Three Types of Plate Boundaries
DivergentConvergentTransform or strike/slip
Plates interact where they meet.
Divergent boundaries—Plates move apart
Example a spreading center--Mid-Atlantic RidgeThe Mid-Atlantic Ridge goes through Iceland.
Expeditions study unusual life
Or the Great Rift Valley in Africa
Convergent boundaries--plates move together
Three types of Convergent Plate Boundariesoceanic –oceanic
oceanic-continentalcontinental-continental
Oceanic-oceanic
results in subduction of one plate results in island arc volcanoes
Ocean-continental results in subduction of the oceanic plate
Ocean-continentalVolcanoes form when the oceanic plate reaches the lithosphere and begins to melt The less dense molten material rises and forms a volcanoBecause it is a mixture of basaltic oceanic crust and granitic continental crust, the lava is Andesitic
Like the Andes Mountains
continental-continental
Continental-continental
results in enormous mountains like the Himalayas.
Transform-fault boundaries--plates slide horizontallyExample--
Pacific plate and the North American plate slide past each other at the San Andreas fault.