Whod’a thunk? Apparently our own homeworld has a gaping hole in the crust in the Atlantic ocean, 1000s of kilometers across. The crust is simply missing, as reported by the BBC:
Scientists are to sail to the mid-Atlantic to examine a massive “open wound” on the Earth’s surface.Dr Chris MacLeod, from Cardiff University, said the Earth’s crust appeared to be completely missing in an area thousands of kilometres across.The hole in the crust is midway between the Cape Verde Islands and the Caribbean, on the Mid-Atlantic Ridge. . . He said it was an “open wound on the surface of the Earth”, where the oceanic crust, usually 6-7km thick (3.7-4.3 miles), was simply not there. . . “Effectively it’s a huge rupture – one side is being pulled away from the other. It’s created a rupture so big it’s actually pulled the entire crust away.