Earth science: Rock samples indicate water is key ingredient for crust formation

Source: Science Daily

By examining the cooling rate of rocks that formed more than 10 miles beneath the Earth’s surface, scientists have found that water probably penetrates deep into the crust and upper mantle at mid-ocean spreading zones, the places where new crust is made.

https://www.sciencedaily.com/releases/2017/05/170501131717.htm