EESA06H3 Lecture : Lecture 4

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11 Jan 2012
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Lec 4 y red sea is embryonic ocean. (brand new) 20 million years old. It begins to subduct. y as you move away from mid ocean ridge the thickness of the ocean crust increases because the oceanic crust is cooling away from the ridge and so it thickens. It wants to sink back down into the mantle. y oceans are shallower along centerline and crust thickens, begins to subduct. y y earth history is really controlled by ocean history. In earth history, like an accordion, it opens and closes. oceans are doing. Like an accordion (something that opens and closes). y history of continent is dictated by history of the ocean. Mineral rich rocks. y eukaliopes (?) eukal (mountain) and aloipe (leap). Floods they get in iceland. y water coming out of mountain as ice melts and there s eruption and ice melts.

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