That would be called magma.
Lava is molten rock. The rock deep inside the earths mantle is always molten, and when it occasionally breaks through to the surface, the opening is called a volcano, and the liquid rock spilling out of the top is lava.
lava
lava
"are places on the earth's surface where molten rock, gases, and ash from deep inside the earth are ejected."
pressure from the heat under the earths surface
magma
it is called magma.
Its spinning, molten, liquid, iron core.
Molten liquid rock inside Earth's mantle is called
lava or magma because magma is the molten rock inside the volcano and lava is the molten rock that's on the earths crust or outside of the volcano.
Magma is heated to its molten state via heat from the Earth's core and that heat is held in by the earths crust. Once on the surface there is nothing to keep it molten and is it cooled by the outside air.
It is called magma