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Boundaries Types. Transform Two plates slide past each other Two plates slide past each other As they slide, earthquakes often occur As they slide, earthquakes.

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Presentation on theme: "Boundaries Types. Transform Two plates slide past each other Two plates slide past each other As they slide, earthquakes often occur As they slide, earthquakes."— Presentation transcript:

1 Boundaries Types

2 Transform Two plates slide past each other Two plates slide past each other As they slide, earthquakes often occur As they slide, earthquakes often occur Examples: California’s San Andreas Fault Examples: California’s San Andreas Fault

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4 Divergent When two plates spread away from each other forming new crust When two plates spread away from each other forming new crust Causes earthquakes and volcanoes Causes earthquakes and volcanoes Usually undersea Usually undersea Example: Iceland Example: Iceland

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6 Convergent- Ocean-Ocean When two ocean plates meet When two ocean plates meet As the denser plate slides underneath the other, the plate melts to magma and rises As the denser plate slides underneath the other, the plate melts to magma and rises Magma reaches ocean floor and slowly rises to form volcanic island arcs Magma reaches ocean floor and slowly rises to form volcanic island arcs Earthquakes can occur Earthquakes can occur Example: Ring of Fire Example: Ring of Fire

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8 Convergent – Ocean-Continent When an ocean plates slides under a continent plate When an ocean plates slides under a continent plate Forms volcanoes and earthquakes like an ocean-ocean boundary Forms volcanoes and earthquakes like an ocean-ocean boundary Examples: Western South America (Andes), Mt. St. Helens, Washington Examples: Western South America (Andes), Mt. St. Helens, Washington

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10 Convergent Continent-Continent Occurs when two continent plates meet Occurs when two continent plates meet Since similar densities, they do not slide easily underneath in to mantle Since similar densities, they do not slide easily underneath in to mantle The force of the collision pushes up mountains The force of the collision pushes up mountains Earthquakes are common Earthquakes are common Example: The Himalayas Example: The Himalayas

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