Vertical slices though the magnetic structure at t = 84 min and a resolution of 12.5 km: (a) the vertical component of magnetic field (color background), flow velocity (arrows), magnetic field lines (contour lines), and (b) variations of density with respect to a mean density profile of the convection simulations without magnetic field. The velocity vectors and magnetic field lines in panel (a) are calculated from the corresponding x- and z-components.