Term
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Definition
| continents drifted to current location (from Pangaea) |
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Term
| who proposed the continental drift theory? |
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Definition
| proposed by Wegner in 1912 |
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Term
| what were the problems of the con. drift theory? |
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Definition
| he didn't have proof and he didn't have an explanation. |
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Term
| fossil clues of con. drift theory |
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Definition
| similar plant and animal fossils found on both sides of the Atlantic |
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Term
| climate of con. drift theory |
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Definition
glacial evidence in warmer climates
fossils of ferns in cold climates |
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Term
| climate clues of con. drift theory |
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Definition
glacial evidence in warmer climates
fossils of ferns in cold climates |
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Term
| rock clues of con. drift theory |
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Definition
| similar rock types found on both sides of the Atlantic Ocean |
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Term
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Definition
| molten rock pushed thru at mid-Atlantic Ridge |
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Term
| seafloor spreading proposed by henry hess (1960's) |
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Definition
proof
newer rocks near mid-Atlantic Ridge
magnetic clues in rocks |
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Term
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Definition
| crustal sections (plates) move around on mantle |
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Term
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Definition
| plates move by convection current |
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Term
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Definition
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Term
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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) |
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Term
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Definition
| denser oceanic plate goes under less dense continental plate (ex. California Coast) |
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Term
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Definition
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Term
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Definition
| two oceanic plates move apart (ex.- mid-Atlantic ridge |
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Term
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Definition
| two continental plates move apart (ex. - E. African rift valley) |
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Term
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Definition
| plate slide by each other- ex. - San Andreas fault (California) |
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Term
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Definition
| vibrations that rocks produce when they break |
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Term
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Definition
| surface that rocks move along when they break |
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Term
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Definition
| caused by rock above the fault moving downward in relation to he rock below the fault |
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Term
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Definition
| compression forces squeeze rock above the fault up and over the rock below the fault |
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Term
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Definition
| rocks on either side of the fault move past each other without much upward or downward motion |
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