A(Li) as a function of [Fe/H] for all stars listed in Table 1, shown as two different branches. The top branch, with A(Li) > 1.0, represents the expected Li evolution in the Galactic thin disk. The bottom branch, with very depleted Li values less than 1.0, contains a mixture of thick-disk stars in the low-metallicity domain with [Fe/H] < −0.2 and thin-disk stars with larger metallicities values up to 0.28. Among the thin-disk, Li-depleted stars, with −0.15 < [Fe/H] < 0.01, we include the HAHM stars discussed in Sect. 2.1 The corresponding ages (a) and the U Galactic radial velocities (b) are shown in vertical color scales.