GEOL 106 Chapter Notes - Chapter 2: Pacific Plate, Oceanic Crust, Laurasia
6 Nov 2018
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Hot spots: characterized by volcanic centres resulting from hot materials produced deep in mantle perhaps near core-mantle boundary. Partially molten materials are hot but buoyant enough to move up through mantle and tectonic plates: e. g. yellowstone national park, atlantic and pacific oceans. Hot spots are fixed deep in mantle chains of volcanic islands and submarine volcanoes along floor of pacific ocean that get older farther away from hot spot provide evidence to support movement of. Pacific plate: ages of volcanic islands and submarine volcanoes could systemically change as they do only if the plate is moving over hot spot. Tethys sea between africa and europe-asia closed due to activity produced alps in europe. 50 million years ago: indian crashed into china in south asia: still happening today produced. 2. 5 how plate tectonics works: putting it together. Plates move episodically in large pulses every few hundred years or so cause earthquake.
