field value to account for the possibility of cooling rate effects (in general, laboratory cooling rates are by necessity much faster than those in nature, motivating application of correction factors). Modeling and experimental data suggest that cooling rate effects are nominal for pseudosingle domain grains [@Winklhofer1997; @Yu2011; @Ferk2012]. Without correction, raw data from 3.2 Ga silicate crystals are essentially indistinguishable from the modern field intensities.

A few studies of whole rocks, where the principal magnetic carriers were thought to be fine magnetite exsolved in silicate crystals, are also of note. A recent restudy of the 2.78 Ga [@Feinberg2010] Modipe Gabbro indicated a virtual dipole moment of 6 x 10$^{22}$ A m$^{2}$ [@Muxworthy2013]. This study lacks a field test on the age of magnetization, but the pristine nature of select outcrops suggests the magnetization could be primary. Inexplicably, @Muxworthy2013 do not consider the possibility of post-emplacement tectonic tilt. Given that the in situ magnetic inclination is very steep (I= 70$^{o}$ reported in @Muxworthy2013; I = 85$^{o}$ in @Evans1966, and I = 89$^{o}$ in @Feinberg2010), it is most likely that the true paleolatitude is shallower if the Modipe Gabbro has been tilted. @Denyszyn2013 convincingly argue that the unit has been tilted, but 