We show that the Galactic thick disk reaches at least solar metallicities , and that it experienced strong chemical enrichment during a period of \sim 3 Gyr , ending around 8-9 Gyr ago .
This finding puts further constraints on the relation and interface between the thin and thick disks , and their formation processes .
Our results are based on a detailed elemental abundance analysis of 261 kinematically selected F and G dwarf stars in the solar neighborhood : 194 likely members of the thick disk and 67 likely members of the thin disk , in the range -1.3 \lesssim [ Fe / H ] \lesssim + 0.4 .