What is the mid-Atlantic ridge made up of?

The Mid-Atlantic Ridge is primarily composed of a continuous underwater mountain range formed by tectonic activity, specifically the divergent boundary between the Eurasian and North American plates in the north and the African and South American plates in the south. It is made up of basaltic rock, which is formed from magma that rises from the mantle as the tectonic plates pull apart. This ridge is characterized by volcanic activity, hydrothermal vents, and a variety of unique ecosystems. It plays a crucial role in seafloor spreading and the geological processes of the Earth.