Distribution of the depletion δ_X with [Zn/Fe] (depletion sequences), derived from the observed [X/Zn] (see Sect. 3.1). The black squares are for DLAs and the orange diamonds are for the Galactic lines of sight. The distributions of Zn and Fe depletion are shown here for clarity. They have no scatter by construction. The dash-dotted curve shows what the depletion of Fe would have been if we had assumed the expected [Zn/H] trend with [Zn/Fe] based on Eq. (10) of Jenkins (2009); see Fig. 5. This is shown only for Fe, as an example.