EESA06H3 Lecture 7: Lecture 7 (How Oceans Die)
Document Summary
How oceans die: part 2: the tethys ocean is dead: a geologic tour of the alpine - himalayan. Comes back as continental crust: continents that are surrounding pacific rim are moving in. Land masses are expanding in size because new material is being added to the leading edges (active plate margins as a result of added to the leading edges (active plate margins as a result of subduction) Ancient conditions where other oceans will close. Adding to the leading age of continents. Growing as a result of this: if you could come back after a few billion years, the continents will be bigger. North america is 70x the size it was 4 billion years ago. Secretion process happens in the expense of oceans. Villarica and llaima volcanoes: chile -> long skinny country. Big subduction zones off of shore: volcanoes that occur on land. Old dead volcanoes but are not really dead -> tend to erupt unexpectedly.
