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aoifes geography

earths surface- shaping the crust

TermDefinition
active volcano a volcano that erupts regularly
aftershock small tremors that follow an earthquake
alpine period of folding about 30-35 million years ago
anticline down word fold
armorican period of folding when the Eurasian plate and African plate collided about 250 million years ago
caledonian period of folding when the Eurasian plate and the American plate collided about 400 million years ago
cone the shape of a volcanic mountain after several layers of lava had poured out
constructive boundary when two plates are seperating forming a new crust
continental drift the process where by the Earths plates move and carry the continents with them
convection currents circular movement of magma in the mantle which rises, moves to the side then drops again
core center of the earth
crater the opening at the top of the vent of the volcano
crust outer layer of the earth
destructive boundary where two plates are colliding and destroying the crust
dormant volcano a volcano that hasn't erupted in a long time but may erupt again
Created by: roisinmurphy
 

 



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