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Definition
| continents drifted to current location from pangaea |
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Term
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| propossed continental drift 1912 |
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| problems of continental drift |
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Definition
1 no proof
2 no explanation for how it happened |
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| fossil clues proof of continental drift |
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Definition
| similar to plant and animal fossils found on both sides of atlantic |
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| climate clues proof of continental drift |
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Definition
1 glacial evidence in warmer climates
2 ffossils of ferns in cold climates |
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| rock clues proof of continental drift |
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Definition
| similar rock types found on both side of atlantic |
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Term
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Definition
| molten rock pushed through mid atlantic ridge |
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Definition
| propsed seafloor spreading in 1960 |
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| proof of seafloor spreading |
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Definition
1 newer rocks near mid atlantic ridge
2 magnetic clues in rocks |
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Term
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Definition
| crustal sections (plates0 move around on mantle |
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Term
| how many major plates are their |
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Definition
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Definition
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Definition
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Term
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Definition
two continental (less dense) plates collide (ex. india and asia)
form mountains |
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Definition
| denser oceainic plate goes under less dense continental plate (ex. california coast |
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Definition
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Definition
| two oceanic plates move apart (ex mid-atlantic ridge) |
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Definition
| two continental plates move apart (ex . East african rift valley) |
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Term
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Definition
| plates slide by eachother (ex san andreas fault California |
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