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Continental Drift

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Continental Drift

What did Wegener notice?

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Arthur Holmes

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Cross-section through Earth

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Types of Plate Boundaries

Oceanic-Oceanic

Arcs and trenches

Mount Pinatubu

Oceanic-Continental

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Mt. Rainier, Cascade Range

Andes Mountains, Peru

Continental-Continental

Or in other words

Tibetan Plateau

Cross-section

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Divergent Plate Boundaries

Iceland

Mid-Atlantic Rift, Iceland

Krafla

African Rift

Oldoinyo Lengai, East African Rift

'Erta 'Ale (Ethiopia)

Hot Spots

Map of World’s Hotspots

Wahaula Visitor Center

Mauna Loa

Hawaii from Space

Pacific Basin and the hotspot train

Slide 48

Transform Faults

San Andreas Fault

Calaveras Fault

Calaveras Fault

How we lose plates!