[Starwind]

That double 'S' running down the center of the Atlantic looks like the mid-Atlantic plate subduction zone.

Amazing that what took oceanographers and geologists so long to map from ocean floor spreading studies is so visible in one shuttle photo.

[RadioAstronomer]

mid-Atlantic plate subduction zone.

The Mid Atlantic Ridge is a rifting process creating new ocean crust. It is not a subduction zone. The Pacific Plate is subducting under the North American Plate though.

From what I see, IMHO, this is not a real photo.

[Hootch]

Where did ya get that secoind photo? That is very cool.

[OXENinFLA]

Great 2nd Pic.

Where did you find it?

I've always wanted a 3d pic of the earth w/o water.