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| continents drifted to current location (from Pangaea) |
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| land when all continents were formed together |
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| German meteorologist that proposed continental drift |
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| problems with continental drift theory |
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| no proof and no explanation how it happened |
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| similar plant and animal fossils found on both sides of the Atlantic Ocean |
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Glacial evidence in warmer climates Fossils of ferns in cold climates |
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| similar rock types found on both sides of the Atlantic Ocean |
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| molten rock pushed thru at mid-Atlantic Ridge |
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| proof of seafloor spreading |
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Newer rocks near mid-Atlantic ridge Magnetic clues in rocks |
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| who proposed seafloor spreading |
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| crustal sections (plate) move around on mantle |
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| where plates come together |
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| two continental (less dense) plates collide (ex.- India and Asia |
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| denser oceanic plates goes under less dense continental plate (ex. – California coast) |
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| two oceanic plates move apart (ex. – mid-Atlantic ridge) |
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| two continental plates move apart (ex. – E. African rift valley) |
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plates slide by each other (ex. – San Andrea’s fault (California) |
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