EESA06H3 Lecture : Lecture notes from the Live lecture
Document Summary
guyots: (named after an oceanographer) a flat topped dead volcano hot spots are usually associated with hot spot islands in the middle of oceans. 60"s asked why there was islands in the middle of the oceans, which is why we know about hot spots. on the islands the rocks are much younger than the surrounding ocean floor. the youngest island which is brand new (right above a hot spot) there is a systematic aging of the rocks as you move away from the hot spots and move down the trail. the orientation of the hot spot trail gives the direction for the plate movement. bathymetric- a map that shows water depths. phreatomagmatic means to do with water, water will go down and hit the magma and create steam, this leads to pyroclastic eruptions.
