How Was The Andes Formed - 18 november 2015 the andes have been a mountain chain for much longer than previously thought, new. Web the andes were formed by tectonic activity whereby earth is uplifted as one plate (oceanic crust) subducts under another. Web all the other major mountain belts on earth, such as the himalaya and the alps, were formed due to colliding continents. The andes were formed by.
18 november 2015 the andes have been a mountain chain for much longer than previously thought, new. The andes were formed by. Web all the other major mountain belts on earth, such as the himalaya and the alps, were formed due to colliding continents. Web the andes were formed by tectonic activity whereby earth is uplifted as one plate (oceanic crust) subducts under another.