The region is located right above the boundary between the hot liquid outer core and the stiffer, cooler mantle. (sciencedaily.com)
The Outer Core Made of molten iron, nickel, and other ingredients yet to be determined, the churning liquid outer core may have the viscosity of water, streaming at possibly one to several miles per week with the turbulence of a gargantuan, slow - moving washing machine. (discovermagazine.com)
Deep inside Earth, slow - motion convection of rocky minerals in the mantle and heat loss from the cooling solid inner core cause convection in the liquid outer core. (discovermagazine.com)