EESA06H3 Lecture 9: Lecture 9 – Planet Earth.docx
27 Apr 2012
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Obduction: the process by which continents collide [no subduction] The future of planet earth techtonic changes can makes changes over a long timescale climate changes in eastern africa that promoted human development. India: the collision start 20mya the mediterarian is a remnant ocean that is closing > caused by africa moving the alpes are a product of africa colliding with europe. Melt large area of nice > produce granite > rhyolite local melting [do not see volcanoes in obduction zones] Ophiolite > green rocks that results from the metaphorism of basalt in canada called > green belt rocks [found in canadian shield] Earthquakes in china are a result of india moving north. Orogeny > the process that build mountions. Orogen > the rocks that are apart of the process. Slide 11 closure of the tethys ocean > as pangea breaks up. India separated from antartica due to a midocean rift > this the process.
