Propagation diagram for model ℳ, displaying a zoomed-in view of Fig. 1 near the bottom of the convective region. The buoyancy frequency N/2π and Lamb frequency S_l/2π for l = 1, 2 are shown as the full and dashed (S₂ being the higher) profiles, respectively. The horizontal dotted line indicates a representative high frequency ν_high of the model, with its g-mode cavity marked in red. The horizontal dot-dashed line shows a representative lower frequency ν_low. The vertical dotted and dot-dashed grey lines indicate suitable respective truncation points in r/R. The vertical solid grey line represents a truncation point at the bottom of the convective region. The buoyancy glitch is marked as the hatched area.