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9 Cards in this Set
- Front
- Back
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continental drift
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Alfred Wegener's hypothesis that said the continents had moved
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Pangaea
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all the continents formed a part of a single landmass.....all the continents together as one
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Panthalassa
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a huge ocean surrounding Pangaea it means all seas....all the oceans together as one
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Mesosaurus
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a small extinct land reptile that lived 270 million years ago....fossil records for it found
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MId-Atlantic Ridge
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an undersea mountain range with a steep narrow valley running down its center....part of mid-ocean ridges
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mid-ocean ridges
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system of undersea mountain ranges that wind around the earth
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seafloor spreading
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movement of the ocean floor away from either side of a mid-ocean ridge
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Normal Polarity
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all the rocks with magnetic fields pointing north fell into this time period
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Reversed Polarity
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all the rocks with magnetic fields pointing south fell into this time period
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