The Gakkel Ridge is the slowest spreading mid ocean ridge on Earth, and the new reading suggests its melt reaches the surface in bursts rather than in a continuous supply.
Sixty magnetic profiles flown across the Arctic’s Gakkel Ridge in 1974 and 1975 classify about 68 percent of the seafloor they cross, from the present back to roughly 35 million years ago, as exhumed mantle rather than volcanic crust
Science Blog Editorial Team