Examples of the final results obtained in the models. (a,b) Dry experiment GD7 without additional sand input. (c,d) Aqueous experiment GA 14 with additional sand input. Interpretative drawings of (a,c) the final surface views and (b,d) the cross-sections. E, T, C and D denote the deformation zones in the surface view (E: extension, T: translation, C: compression, D: damage); the final displacement of marker M1 is also highlighted. I, II and III indicate the order in which the faults spear on the cross-section. The vertical exaggeration in the cross-sections is x4.4.