EESA06H3 Lecture Notes - Lecture 5: Passive Margin, Continental Shelf, Uniformitarianism
Document Summary
Lecture 5: red sea embryonic/junior ocean, atlantic ocean mature ocean. Uniformitarianism downfall: there is a limit to the processes that we can see. Finland: active margin subduction zones where there are lots of active volcanoes and earthquakes, west (vancouver, san francisco, continental shelf flat; very shallow water. Origin of passive margins by thinning and rifting e. g. breakup of pangea: passive margins are very important for natural resources. Iceland: (cid:1684)land of ice and fire(cid:1685) volcanoes buried underneath ice cap: fire because there is plume underneath; a lot of volcanic activity. Iceland is the only part of the world which is getting bigger every year; it is being pushed apart. The position of the plumes is fixed: rocks that formed underneath the plumes move. Iceland is spreading because there is always new material that is being added at the middle. It is stretching but the whole thing is moving towards the (left) west: ridge jump the mor jumps.
