Molten rock
Why the volcano erupts - and... [DOC] [TLE] Hot Superblobs at Earth's Core Feed Rivers of Molten Rock [PAR] Sep 2, 2015 ... Mantle plumes, proposed rivers of hot rock in the Earth's mantle that stream up to 
the surface and form volcanic island chains, seem to anchor... [DOC] [TLE] Molten Rock Equipment | Facebook [PAR] Unit 2 Rook Tree Farm, Hulcote.