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Most of the the rocks on the edge of the continent all match equally, and some rocks are magnetic North and others are magnetic South. However; this fact only proves that the Earth's landmasses have changed over time.

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โˆ™ 12y ago
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โˆ™ 12y ago

The magnetism in basaltic rock on the ocean floor suggests that the continents have been moving away from each other. The earth regularly undergoes magnetic shifts in which north becomes south and vice versa. As the magma rising through the diverging ocean floor cools into basaltic rock, it takes on the magnetic properties of the earth at that moment. In this way we can tell which way the continents are moving and that they were likely joined in the past. On top of this, the general shape of the continents also suggests this supercontinent as well as the distribution of species.

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Q: Explain how looking at the magnetism of certain rocks helps support the idea that the continents have moved and changed over time?
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