what type of magma formed at mid-ocean ridges
Mid-ocean ridge Mid-ocean ridges are geologically active, with new magma constantly emerging onto the ocean floor and into the crust at and near rifts along the ridge axes. The crystallized magma forms new crust of basalt (known as MORB for mid-ocean ridge basalt) and below it, gabbro.[1] They are formed by two oceanic plates moving away from each other. Hydrothermal vents are a common feature at oceanic spreading centers. [2]