When oceans become crust.
Three-fifths of Earth’s crust lies underwater, spread out along the seafloor. More than four cubic miles of ocean crust forms each year, constantly regenerating like new skin across the globe. This ocean crust arises along mid-ocean ridges — underwater mountain ranges that ripple along the ocean floor like jagged scars.
– Oceans apart: New research suggests that ocean-crust formation is a dynamic process