Longest mountain range, running through the Atlantic Ocean, separating the Eurasian and North American plates in the north, ...

As it cools down, the lava creates a long line of mountains under the ocean called the Mid-ocean Ridge - the longest mountain range on Earth. The longest mountain range on land is the Andes in ...

Mountains and volcanoes rise along the seam. The process renews the ocean floor and widens the giant basins. A single mid-ocean ridge system connects the world's oceans, making the ridge the ...