Extended Data Fig. 2 | The development of the protokeel during subduction
at elevated mantle potential temperature. The evolution of the effective
viscosity (left column, panels a–d) and density (right column, panels e–h)
fields computed for the reference model (Fig. 1 ) at elevated mantle potential
temperature of Tp = 1, 500 °C (ΔT = 200 °C) is shown. Arrows in the left column
show evolution of the velocity field. ‘lg’ is used for the decimal logarithm.