Figure 7.

The scaled growth history is shown for each Mars analogue. From Hf–W evidence, Nimmo & Kleine [71] predict with 90% confidence that Mars growth history should not pass through the dark square region and with 63% confidence that it should not pass through the light red (grey) rectangular region. Using the same evidence but assuming an exponential growth model, Dauphas & Pourmand [72] predict that Mars accretion history should evolve inside the green top left triangular region. (Online version in colour.)