Final answer:
Mid-ocean ridges are characterized by normal faults, tension, contact metamorphism near magma chambers, and metamorphism associated with hot seawater. These features occur due to the divergence of tectonic plates and the activity at the mantle upwelling current-induced rift zones.
Step-by-step explanation:
Mid-ocean ridges are characterized by several geological features. They are underwater mountain ranges where tectonic plates diverge, creating a rift. This process is driven by mantle upwelling currents. Among the characteristics of mid-ocean ridges are normal faults, which occur due to the tensional forces as the plates pull apart. Additionally, the area experiences tension as a result of the diverging tectonic plates.
Furthermore, there is metamorphism associated with hot seawater as the sea infiltrates through fractures and gets heated by the underlying magma, altering the composition of the surrounding rocks. Lastly, contact metamorphism occurs near magma chambers, where the intense heat can transform the minerals and textures of the rocks.