Mid- Atlantic ridge is a part of constructive plate boundary or divergent plate boundary. This linear feature lies in the midst of a two tectonic plates that are apart from each other. Active divergent plate boundaries usually take place in the middle of oceanic plates then become mid-oceanic ridges. In fact that a Mid- Atlantic Ridge is mainly an underwater feature, some of its segments have an altitude that extends above sea level. Its boundary is situated along Atlantic Ocean's bottom and areas of the world's longest mountain range.