Fig. 9. (a) Three steps of the pressure solution creep: ΔμD, ΔμT and ΔμP are driving forces fordissolution, mass transport and precipitation, respectively.(b) Schematic of the model with two grains with a diameter d and a grain-tograin contact with an area Ac (in red). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article).