Ternary diagrams of the cINN prediction. Top panel: kernel density estimate of the layer mass fractions as determined with the cINN. Bottom panel: kernel density estimate of the mantle composition. The kernel density in both panels was estimated using a Gaussian kernel with a standard deviation of 0.2. The white lines indicate the contours of the 68% HDR and 95% HDR. For comparison, the HDR from the posterior calculated with the MCMC is also shown (dashed lines).