What geophysical mechanism, modeled in 2007, could explain the undulating appearance of ancient Martian shorelines?

Answer

True polar wander

A geophysical model proposed in 2007 suggested that significant mass redistribution, such as the growth of the Tharsis volcanic region, could have caused a shift in the planet's rotation axis, resulting in true polar wander that tilted the surface features.

What geophysical mechanism, modeled in 2007, could explain the undulating appearance of ancient Martian shorelines?
ancientMarsGeologyevidenceshoreline