Figure 4: Pressure–temperature diagram showing generalised carbonate phase relations in subducted, carbonated oceanic crust. The melting curves of carbonated basalt at upper mantle and transition zone ...

A schematic image of subducted oceanic crust inferred from this study. Basalt and harzburgite layers of the oceanic crust accumulate beneath and above the 660 km discontinuity, respectively.

Scientists have been left stunned by the discovery of mysterious giant creatures living in the ocean crust. Our oceans are home to some weird and wonderful creatures that continue to baffle experts.