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Geology 112

1.5 - Continents

QuestionAnswer
What type of volcanism occurs at 'Island Arc' Andesite volcano
What type of volcanism occurs at the MOR? Basaltic Volcano
How can you tell an ocean floor is relatively young? No subduction zone
How thick is continental crust? generally 30 km thick, Himalayas and Andes up to 60 km thick
Plate tectonics slowly adds to continents, eg? Australia East of broken hill in the last 500 Ma.
Rodinia? Supercontinent 1100 Ma.
Created by: shiftyleigh
 

 



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