EESA06H3 Chapter Notes - Chapter 3: Asthenosphere, Accretionary Wedge, Oceanic Crust
Document Summary
Ave wilson"s cycle about 400-500 million years ago. How many super continents can you identify back into history. What do earthquakes tell us about the planet"s interior, and plate tectonics. How long will it take for them to go through the body of the planet (description of earthquake) The good news: seismic energy is used to map the earth"s interior. Its hard to keep the drilled hole open! They come back up to the earth"s surface. When plate collides, they will frost up the earth"s surface. Epicentre : directly above the focus the point on the earth"s surface. Trying to image the body"s interior or, the earth"s interior. They are at the margins of the plates. Descending slab excert force called slab pull and pulling the rest behind it. Litho plate is the crust plus the undrlying upper mantle. Always moving, a piece is always change with the piece next door.
