Model results showing erosion rate over a period of 50 Myr following initial escarpment formation (Methods). Note how the escarpment becomes a pinned drainage divide, yet the broad locus of erosion migrates inboard in response to dynamic mantle (Fig. 2) forcing represented by the grey Gaussian curves ( y-axis scale not shown because of variations in the maximum uplift rate across model runs, which depends on the other parameters, namely, wave width, velocity, relative densities and initial topography; see Methods).
