Telegraph.co.uk | Sea floor next to Australia's Great Barrier Reef 'close to collapse' Telegraph.co.uk The researchers, whose findings were published in the journal Nature Hazards, said the one cubic kilometre slab in the Coral Sea – dubbed the Noggin Block – "eventually will collapse". The ominous slab was discovered by geologists who have been using ... Scientists discover tsunami threat in Great Barrier Reef Sea floor slab poses tsunami risk for Queensland Seafloor collapse threatens tsunami |