Movie 2A Movie shows the microstructural development of fabric during progressive deformation. The fabric was fine grained at the beginning of the experiment. Deformation is simple shear with strain steps (γ) of 0.05 starting at γ = 0. In this movie individual grains are shown in different colours (51 available colours). A grain is defined as a polygon that has high angle boundaries with respect to all its neighbouring grains. In this representation a high angle boundary is a boundary with a misorientation angle larger than 10°. Additionally, boundaries are shown in different colours, whereby blue signifies a lattice misorientation angle between the adjacent grains below 10° (i.e. subgrain boundaries), and green and red a high misorientation angle > 10° (i.e. grain boundaries). In this movie subgrains form during progressive deformation i.e. blue subgrain boundaries cut through a grain. These subgrains boundaries are parallel to each other within each grain. With further deformation subgrains develop into grains by recrystallization by nucleation or rotation i.e. they change their colour. Although the microstructure is undergoing dynamic recrystallization, the overall grain size distribution of the rock does not change significantly. The general grain size remains very similar throughout the experiment. Some grains are strongly elongate, other grains which have undergone at least one stage of recrystallization by nucleation or rotation are only weakly elongate.  

Movie 2B Movie shows the microstructural development of fabric during progressive deformation. The fabric was fine grained at the beginning of the experiment. Deformation is simple shear with strain steps (γ) of 0.05 starting at γ = 0. In this movie the attribute dislocation density is shown. Blue signifies a value of 0.001 • 1013 m-2 and red 1 • 1013 m-2. See colour bar below for the colour table used.

In simulations, areas of blue appear suddenly and change to light blue and green during progressive deformation. These areas are subgrains that have undergone recrystallization by nucleation (ELLE_NUCL; see Appendix A). Such grains had a stored energy higher than the threshold value for recrystallization by nucleation and have therefore developed into new grains with low dislocation density and high angle boundaries. In the beginning of the experiment the overall bluish colour changes to yellow/green as dislocations accumulate during progressive deformation. No areas of predominately low or high dislocation density develop.
Movie 2C Movie shows the microstructural development of fabric during progressive deformation. The fabric was fine grained at the beginning of the experiment. Deformation is simple shear with strain steps (γ) of 0.05 starting at γ = 0. In this movie the crystallographic orientation of the individual polygons is shown in different colours. Polygons with the basal plane oriented at an low angle to the flow plane are shown in blue. Polygons with the basal plane perpendicular to the flow plane are depicted in red. After strong oscillations at the beginning of the experiment, domains that are characterized by an alignment of several bluish grains develop. In contrast to these bluish areas, there are red and yellow grains which are also forming elongate clusters. A strong shape preferred orientation develops at high strain (Fig. 2B). Grains are either oriented with their basal plane subparallel or subperpendicular to the flow plane.