Figure 5: Fraction of overturned IBC versus time

The fraction of overturned IBC is determined as a function of time. In each file, the first column represents time (in Myr), the second column represents dimensionless time (t = t* kappa / D^2, where t is dimensionless time, t' is dimensional time in second, kappa is thermal diffusivity in m^2 s^-1, D is mantle thickness in meter) , and the third column represents the fraction of overturned IBC.<br>The post-fix of each filed name specifies the reference viscosity, activation energy and viscosity contrast between IBC and lunar mantle. For example, the post-fix a20e200d01 specifies a reference viscosity of 10^20 Pa s, an activation energy of 200 kJ/mol and one-order viscosity contrast between IBC and lunar mantle.