By comparison, the temperature of crustal fluids can reach 400 degrees C at hydrothermal vents in the Mid-Atlantic Ridge, where tectonic plates are diverging and new oceanic crust is being formed.

Tharp’s map provided some of the necessary missing evidence. If the ocean floor was spreading apart at the Mid-Atlantic Ridge ...

Mid-ocean ridge basalts (MORBs), located far from subduction zones, are typically thought to be unaffected by subduction processes. However, some MORBs display arc-like geochemical signatures ...

as shown on the map. These zones include: the Pacific Ring of Fire around the Pacific Ocean the Mid-Atlantic Ridge, a mid-ocean ridge that extends along the floor of the Atlantic Ocean southern ...