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| continents drifted to current locations (from Pangaea) |
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proposed it in 1912 and the problems were
no proof/no explanation how it happened |
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| similar plant and animal fossils found both sides of the Atlantic ocean |
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glacier 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
proposed by Hess in the 1960's
newer rocks neer mid ridge
magnetic clues in rocks |
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| crustal sections (plates move around on mantle |
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| two continental (less dense) plates collide (ex. - India & Asia) |
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denser oceanic plate 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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plate slide by each other
(ex - San Andres fault California) |
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