Abstract
Using 3-D trajectories of probable members of previously photometrically and spectroscopically studied stellar moving groups β Pictoris, TW Hya, η Chamaeleontis, ∊ Chamaeleontis, we confirmed the star memberships and determined dynamical ages. Only stars with complete kinematical data (Hipparcos astrometry and radial velocities) were taken into consideration. The observed temporal sequence of group formation is consistent with the existence of a wave of star formation in the Scorpio-Centaurus OB association region.