Submarine structure

[shadoko]

Hi !

What can be this ~150 x ~100 km structure about 700 km west of Madeira ?

http://img134.imageshack.us/img134/2438/ouestdemadrelv3.jpg

[Appletom]

Welcome to GEH shadoko. This is a good find, it's not in the GEH files nor is it in the GEC database of placemarks.

I have no idea what it is, but it's unusual and cool.