Fig. 6
Model results after 50% shortening for simulations with different sediment viscosities (model configuration is identical to the one shown in Fig. 3). The μt and μb are the viscosities of the top and bottom sediment layer, respectively. The top sediment layer is displayed with a limestone pattern when it has a viscosity different from that of the bottom layer. A-C: The μt and μb are identical and are 1020 Pa s (a), 1021 Pa s (b) and 1022 Pa s. d, e The μt is ten times larger than μb (value is indicated at the top of the panel-column). F: The μt is hundred times larger than μb (value is indicated at the top of the panel-column). Lower sediment viscosities favor internal shearing while the model surface remains relatively flat (i.e. model domain remains more or less rectangular). Higher sediment viscosities favor wedge formation (i.e. considerable topography variation) while the internal shearing is less than for smaller viscosities