while slow-spreading systems (e.g., Mid-Atlantic Ridge) show serpentinite-dominated crust due to inadequate melt supply and seawater-driven hydrothermal alteration. Critically, oceanic core ...

That ridge, it was later discovered, extended through the major oceans of the world. It is now called the Mid-Ocean ... Rift, came very close to land. The rift appeared to be breaks in the earth's ...

Where continents rift apart, new crust is formed ... in east Africa and Iceland, and at the mid-ocean ridges that divide the oceanic crust. The mid-ocean ridges mark the lines along which the ...

The small fissure is linked to the 22-million-year-old, 4,000-mile-long East African Rift System ... mechanisms occurring along mid-ocean ridges where new oceanic crust is generated.