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hmm.... this is also interestin
. Lava includes hot, iron-containing minerals such as basalt, which can be magnetized. As the lava cools it locks in the direction of the magnetic field of the earth. This locks in the latitude at which the lava cooled. On Aneroid peak in eastern Oregon there are lava layers which preserve horizontal magnetic fields. This means that those lavas cooled near the equator. Continental drift has moved them far north to where they are today in Oregon.
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