A lighter layer of rock which makes up the
continents on which we live, and extends under all
the oceans and seas.
|MANTLE||The mantle is a layer of solid silicate-type rock|
between the core and the crust.
It contains more of the lighter elements: oxygen,
calcium, aluminium and silicon.
A weakness in the earth’s outer crust can cause the
upper mantle to melt to the consistency of hot tar.
This can then break through the surface as volcanic