Submarine ridge lying along the floor of the central Atlantic Ocean. It is a long mountain chain running about 10,000 mi (16,000 km) in a north-south direction, curving from the Arctic Ocean to the southern tip of Africa. The mountains sometimes reach above sea level, forming such islands or island groups as Ascension, Saint Helena, and Tristan da Cunha
a submerged mountain and volcano range extending from the Arctic Ocean to the southern tip of Africa It is the most famous example of divergent boundaries
ocean ridge that runs along the centre of the Atlantic Ocean, for some 14,000 km - almost from the Arctic to the Antarctic It was formed at a constructive margin between tectonic plates The Mid-Atlantic Ridge is central because the ocean crust beneath the Atlantic Ocean has grown outwards from both sides of the ridge at a steady rate during the past 200 million years Iceland straddles the ndge and was formed by volcanic outpourings