Figure 3:

Chromium isotopic ratios in anomalous grains identified here and in previous work (Dauphas et al. 2010; Qin et al. 2011). The higher spatial resolution of the new measurements reveals a larger range of isotopic anomalies, although our (1σ) error bars are larger in the present work due to shorter counting times during NanoSIMS isotopic measurements. Arrows indicate that the measured ratios are lower limits for grains not fully spatially resolved on the NanoSIMS mount (Table 1).