Fig. 1: Simulated M2 tidal amplitudes in metres for the time slices representing 750, 715, 680, 660, 655, 650, 635, 630 and 600 Ma (see labels in the top left hand corner of each panel; note that all global maps are plotted on a Mollweide projection).

Note that the colour scale saturates at 1.5 m, in a grey-green colour, for clarity. The grey arrow at 630 Ma point to the coastline where the Elatina formation31 is now located. The formation gives a tidal proxy showing a range consistent with the one presented from the model.