An alternative to crustal velocities supplied by AuSREM is to instead use the crustal model derived by Young et al. (2013a) from ambient seismic noise, which is capable of resolving structures as small as 30–50 km horizontally and 2–5 km vertically (noting that resolution decreases with depth). Unlike the AuSREM crustal model in this region, the features recovered by Young et al. (2013a) share a strong association with the surface geology and constraints provided by potential field data. This supports our contention