EESA06H3 Lecture Notes - Lecture 9: Metamorphic Rock, Volcanism, Tibetan Plateau
11 Jan 2016
School
Department
Course
Professor
Document Summary
Ii) - obduction: alpine-himalayan orogeny: the building of the next supercontinent (pangea, obduction processes as indian sub-continent collides with asia, destruction of the tethys ocean, uplift of the himalayas and climate. On the cusp of a resource boom. Locus of next super continent = south east asia. Obduction process where continents collide together = earthquakes. Effects are felt over a very large area . Started around 20 million years ago that laid between africa and europe. Mediterranean is a remnant of the ocean. Most common type of rock is gneiss high grade metamorphic rock, high pressure, high temperature. Ex: canadian shield used to be high mountains. Granite pluton is more acidic, high content of silica. Rhyolite produced from high explosive volcanism, local melting no subduction. Fold and thrust belts - cover rocks dominantly sedimentary rocks in high pressure: high contents of resources: oil + gas. Ophiolite remnants of oceanic crust: green rocks result from basalts.
