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6 Cards in this Set
- Front
- Back
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Constructive Plate Margin
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Movement of 2 plates in opposite directions.
(Mainly Oceanic <--> Oceanic) |
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Black Smokers
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Extreme super-heated water from beneath the earth's crust comes into contact with the cold ocean water. The minerals (Sulphates) percipitate out and cause the black smoke.
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Mid-Ocean Ridge
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Formed as the magma rises through the 'gap' between the two oceanic plates.
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A Constructive Plate Margin
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North American Plate<-->Eurasian Plate.
Pacific<-> North American |
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Magnetic Reversals
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Magma in the Outer Core is rich in Iron (Fe) causing a magnetic field. Magma exits the earth, Iron in the magma lines up with the field. It solidifies. 'Polar Flip' occurs and the new iron points to the old south.
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A common Igneous rock formed at a Constructive Plate Margin.
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Basalt
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