Lecture 10 - Plate tectonics is a scientific theory which...

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Unformatted text preview: Plate tectonics is a scientific theory which describes the large scale motions of Earth's lithosphere which is made up of the crust and the uppermost mantle . Lithosphere Tectonic plates are able to move because the Earth's lithosphere has a higher strength and lower density than the underlying asthenosphere. Their movement is driven by heat dissipation from the mantle . What is subduction? Illustration No. 1 Subduction Zone Simushir is a deserted, 5-mile-wide volcanic island in the Kuril island chain, half way between northern Japan and the Kamchatka Peninsula of Russia. The islands and volcanoes of the Kuril chain are part of the Pacific Rim of Fire, marking the edge of the Pacific tectonic plate. Low stratus clouds approaching from the northwest (from the Sea of Okhotsk--top left) bank up against the northwest side of the island, making complex cloud patterns. Pacific Ring of Fire: Mt. Fuji, Japan Pacific Ring of Fire: Papua New Guinea, Solomon Islands, Vanuatu New Zealand lies at the edge of both the Australian and Pacific tectonic plates. To the northeast of New Zealand, and underneath North Island, the Pacific Plate is moving towards, and being subducted below the Australian...
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Lecture 10 - Plate tectonics is a scientific theory which...

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