a $\sim$3416 Ma conglomerate is found, dominated by dacite clasts. @Usui2009 found that the dacite clasts contained two distinct components of magnetization. At low to intermediate unblocking temperatures, the magnetization from many clasts defined a common direction that was indistinguishable from the magnetic field during the $\sim$180 million-year-old Karoo magmatic event that affected most of the Kaapvaal Craton. At high unblocking temperatures ($\gtrsim$525-550 $^{o}$C), another distinct component was defined; the direction of this component differed between clasts. A formal test [@Watson1956] showed that these directions indicated that the hypothesis that these directions were drawn from a random population (as expected for a conglomerate recording a primary direction) could not be rejected at the 95% confidence interval.

The parent body of the dacite clasts is exposed in the Barberton Greenstone Belt; bulk samples show a similar component structure as that seen in the clasts, but the high unblocking temperature magnetization, while grouped (as would be expected in the parent rock) showed a scatter that was unusually high as compared to that typically seen in younger igneous rocks. It must be remembered, however, that these are from bulk samples, which typically contain a wide range of magnetic grain sizes. The largest multidomain 