EESA06H3 Lecture 3: Lecture 3 notes
8 Feb 2012
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Y uniformitarinism ( french used term actualism) : what s happening in term of present terms in comparison to the past: different settings in plate tectonics, rocks: heated, folded using clues from modern day. Catastropic events: super volcanoes ;yellow stone, tie poland, marborough (peterborough: 400 million year old lime stone with volcanic ashes ) : figure 2. 40- continental slab that is part of supercontinent it s warm at the bottom so it rises because there is heat trapped so it rises from the mantle : inflation. Inside is dry and supercontinent isn t good for environmentsurrounded by deep ocean and bottom of ocean under the influence of light lifes and triple junction occurs. 2 of the arms grow up and become active but the other fails and cracks. Fail rift: aulacogens : fill up with sediment through time and contains oil and gas. Pangea developed: these are the rifts tht existed and developed into atlantic ocean.
