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7 Cards in this Set
- Front
- Back
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Distribution of volcanoes
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occur at hot spots or convergent boundaries forming volcanic island arcs
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Sea floor spreading
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magma rises at the mid oceanic ridge forming new crustal material and platers move apart
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midoceanoic ridge
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worlds longest mountain chain the rift vally running dow the center of the ridge is the site of new plate growth
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Thickness of the sediments on the ocean floor
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as you go from the mid oceanic ridge the sediments get thicker and older
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suduction zone
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a denser oceanic plate goes under either a continental plate or another oceanic plate
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ancient moutain chain
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longest moutain chain in the world
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magnetic reversals
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used to show pattern of rock formation around mid ocean ridges,reflected the reversal of magentic north
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