At the Mid-Atlantic Ridge (and other places), material from the mantle is pushed upward and forces the crust apart, this results in continental drift.
... town has a total area of 41.7 km² (16.1 mi²). 37.6 km² (14.5 mi²) of it is land and 4.1 km² (1.6 mi²) of it is water. The total area is ...