Question

Question #86cff

Answer 1

Yes, it does. In more than one place.
It's the reason the Earth's continents have moved to their present positions.

Explanation:

Probably the best-known place is the Mid-Atlantic Ridge, one of the boundaries between Earth's tectonic plates.

This seafloor-spreading boundary runs all the way under the Atlantic Ocean, from the Antarctic Plate, through the middle of Iceland and past Greenland . (It's the reason Iceland has volcanic activity.)

You can see it here between Africa and the Americas. The lines bordered by red are spreading boundaries, where new oceanic crust is added to the planet.

(Seafloor spreading article, Wikipedia)

The Mid-Atlantic Ridge is one of three kinds of tectonic plate boundaries . The other two are subduction zones and transform boundaries.

Here's a map of all the tectonic plate boundaries :

(Seafloor spreading article, Wikipedia)

Basically, new crust is added to the Earth at spreading plate boundaries, where magma slowly "bubbles up" and pushes existing crust apart little by little, and removed at subduction zone boundaries , where one tectonic plate is forced (subducts) under another, and melts back into magma in the mantle.

Iceland and the Rift Valley in Africa are two places where spreading boundaries are at the surface, on land, rather than under the oceans.