Ocean ridges form because(C) they are submarine collisional mountain belts, forming submarine mountains that haven't yet risen from the sea floor.
Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth's tectonic plates spread apart. As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt.
This ridge system includes the Mid-Atlantic Ridge, Mid-Indian Ocean Ridge, Carlsberg Ridge, Pacific-Antarctic Ridge, and the East Pacific Rise with its related features, including the Chile Rise, Galapagos Rift Zone, Gorda Rise, and Juan de Fuca Ridge.
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