Seismic study reveals ancient ‘islands’ deep within Earth’s mantle

Deeply hidden in Earth’s mantle there are two huge “islands” the size of a continent. New research from Utrecht University shows that these regions are not only hotter than the surrounding graveyard of cold sunken tectonic plates, but also that they must be ancient: at least half a billion years old, perhaps even older. Deeply hidden in Earth’s mantle there are two huge “islands” the size of a continent. New research from Utrecht University shows that these regions are not only hotter than the surrounding graveyard of cold sunken tectonic plates, but also that they must be ancient: at least half a billion years old, perhaps even older. Earth Sciences Phys.org – latest science and technology news stories