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Hot-spots and Absolute Movement Rates 1. Absolute motion of the Aragorn Ocean and the Bilbo Continent Notice the Gandalf Islands. They are analogous to the Hawaiian Islands on Earth. They form a linear chain that originated by the migration of the plate over a mantle hot spot. Mantle hot spots are assumed to be fixed relative to the center of the planet. All of the Gandalf islands are volcanic in origin but the easternmost and largest island--which is sitting directly over the hot spot--is the only one with active volcanoes on it. The rocks on the westernmost island have been dated by radiometric methods at 32 m. y. Measure the distance between the centers of the westernmost and easternmost Gandalf islands and use this information to calculate the absolute movement rate (in mm/y) of the Aragorn Ocean (and the Bilbo Continent, which is connected to it). Show your equations and explain where you got each of your numbers. Helpful hint: Pay no attention to the magnetic anomalies when answering this question. (4pt)
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