Interior structure (left) and interior melting degree (right) of our Earth analogue shown with time from 0 to 5 Myr represented by the angle. The distance from the centre is normalized by the instantaneous planetary radius. Heating due to decay of ²⁶Al initially leads to melting of the primitive MetSilWat material to form clay beneath a layer of ice. Further heating leads to full interior differentiation within 0.3 Myr. As the radiogenic energy runs out, the continued accretion leads to the emergence of a thick clay mantle overlaid by a massive surface ocean after 3 Myr. The accretion energy finally becomes high enough, after approximately 3.4 Myr, for a run-away greenhouse effect in the ocean-atmosphere system to heat the surface to above the melting temperature of silicates; this leads to a wholesale differentiation of the planet into a silicate mantle and a metal core. The contour lines show the 10, 100 and 1000 bar pressure levels in the outgassed atmosphere.