Magazine article Geographical

Which Is the World's Longest Undersea Mountain Range?

Magazine article Geographical

Which Is the World's Longest Undersea Mountain Range?

Article excerpt

Which is the world's longest undersea mountain range? D Macdonald, Penrith

ANSWER: The Mid-Atlantic Ridge isn't just the world's longest chain of undersea mountains, it's longer that any of those found on land. And it isn't alone--the ridge that lies roughly in the middle of the Atlantic Ocean is just one of a chain of ridges that encircle the globe. The ridge, which runs from inside the Arctic Circle south past the Horn of Africa, extends for 15,000 kilometres, and some of 1he peaks rise four kilometres above the ocean floor. In some cases they break the surface--forming the islands of Iceland and the Azores. At its southern tip, the Mid Atlantic Ridge meets ridges that extend west into the Pacific and east into the Indian Ocean. Each ridge straddles the gap between continental plates.

It's in this gap--a rift valley--that the mountains on either side are created Magma bubbles up from the rift and solidifies in the cold water, creating plenty of raw material for the mountains on either side. …

Search by... Author
Show... All Results Primary Sources Peer-reviewed

Oops!

An unknown error has occurred. Please click the button below to reload the page. If the problem persists, please try again in a little while.