EESA06H3 Lecture 9: Lecture 9 notes
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2: what will happen in the future to planet earth, alpine-himalayan orogeny: the building of the next supercontinent (pangea i i) obduction - the process where by we collide continents together, no volcanoes but big earthquakes. subduction destroys crust and obduction collides crust and create bigger continents. canada million of years ago were little continents (provinces) and then they collided together and created one big continent north america: obduction processes as indian sub-continent collides with asia, destruction of the tethys ocean. tethys ocean is gone, all of its crust is now in the. Himalayas, this ocean was big as the pacific ocean: uplift of the himalayas and climate change. tectonic processes can change climate on much longer time scales. the oregenic belt (himalayas) changed climate and it lead to a cooling of the planet of the last 20 million years.
