Kiel diagram for the dwarf and giant stars selected from GALAH DR3. Upper panel: number density plot showing the positions of α-normal stars of the main samples of dwarfs and giants. Squares show the positions of extreme [α/Fe]-rich (exαFe, see Sect. 2.2.1) dwarf stars: y-exαFe (age ≤ 3 Gyr) and older exαFe are shown by blue and red squares, respectively. We keep the same notations, but in circles, for giants. Bottom panel: same details, but for stars in the additional sample (open symbols).