The [Mg/Fe] distribution for the RGB stars from the Carina dSph separated into two ages groups: stars  >10 Gyr old are represented by red filled circles, stars  <10 Gyr old are represented by blue filled circles. Stars in the age range 6–10 Gyr are represented either by red open circles (8< age <10 Gyr) or by blue open circles (6< age <8 Gyr). Milky Way halo stars are shown as small grey dots.