Vertical tangential velocities V_b for the blue and red sequences. The plots are for different distance slices, indicated in the top of each column. Each row shows a different V_t selection, indicated in each panel. The blue (orange) curve shows the distribution for the blue (red) sequence. The different relative contribution of the sequences in the different panels is indicative of the spatial distribution of the accreted component and the ancient heated disc, and in particular of a shorter extent of the later one.