EESA06H3 Lecture Notes - Lecture 9: Mid-Ocean Ridge, Gondwana, Asteroid Family

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24 Oct 2012
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In future, new supercontinent in 2 mill yrs (alpine-himalayan orogeny)=pangea 2. Involves obduction-process where we collide continents together, no subduction so no volcanoessubduction-destroys crust, obduction-bigger landmass as colliding crust: tectonic processes can change climateearth would be completely different which was triggered by uplift of huge mountain belt. Earth history is sucession of super continents. Were at the maximum extent of this process: continents are moving apart, atlantic ocean will start to close, pacific already closingreversing this cartoon is the future of the planet over the same timescale. Plate map: red arrows, direction plates are moving, length of arrows proportional to velocity, parts of pacific plate moving fast, headed to japan, heading to south east asia (locus of next supercontinent) Pakistan, south east east are escaping from indent driven up of asia) Chinese, south east asia trying to escape. Occur in linear beltsmajor faults marking where the blocks are moving relative to each other.

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