Stellar density distribution in the age-metallicity plane for volumes 1, 5, and 8 (i.e. from the plane to 50 pc, 0.2-0.3 kpc, and 0.5-0.6 kpc, respectively, above and below the plane) as representative examples of the reported super-metal-rich populations (for these we used the Lallement et al. 2022 dust map). Coloured polygons delimit the areas in the age-metallicity plane used to quantify the z-profiles in Fig. 2. Note that a logarithmic scale has been used to represent the number of stars in order to enhance these relatively low-intensity features.