The crust, mantle and inner core of the earth are all solid rock (or iron in the case of the core). read more
The crust, mantle and inner core of the earth are all solid rock (or iron in the case of the core). The only large portion of the earth's interior that is liquid is the outer core, and lava does not come from there (again, if it did, it would be molten iron). read more
Earth's mantle is a silicate rocky shell with an average thickness of 2,886 kilometres (1,793 mi). The mantle makes up about 84% of Earth's volume. It is predominantly solid but in geological time it behaves as a viscous fluid. The mantle encloses the hot core rich in iron and nickel, which makes up about 15% of Earth's volume. read more
The Earth's mantle is the portion of the planet that lies between the crust and the core. Some of its secrets are now coming to light. The Earth's mantle is the portion of the planet that lies between the crust and the core. read more