Paleomagnetic and 40Ar/39Ar age data are reported from the Usushwana Complex, a layered gabbro and pyroxenite intrusive exposed in Swaziland and eastern South Africa (26.5 ¿S, 31.0 ¿E). The main gabbro body and an associated granophyre return a mean Rb-Sr whole-rock and Sm-Nd mineral age of 2875¿40 Ma. Alternating field and thermal anlaysis of specimens from 18 sites (70 samples) yields a mean direction D=304¿, I=53¿, (k=32, α95=6¿). This direction is significantly different from that obtained from the ~2100 Ma Bushveld Complex. Rare dikes of probable Bushveld age cut the Usushwana Complex, and a low coercivity overprint seen in specimens from a few sites has a Busheld direction and almost certainly reflects this event. Thermal overprinting is recorded by 40Ar/39Ar hornblende and pyroxene ages between 2094¿54 Ma and 2386¿58 Ma that we interpret to have occurred at low temperature but over a significant period of time. Isothermal remanent magnetization acquisition experiments and laboratory unblocking temperatures suggest that primary remanence carrier is single domain magnetite. The paleomagnetic pole position calculated from the Usushwana Complex (9 ¿N, 347 ¿E) is significantly different from other late Archean poles. Although the Usushwana pole is close to the pole from the Palabora Igneous Complex of South Africa (1900 Ma), there is no isotopic evidence indicating a thermal event of that age in the Usushwana Complex. ¿ American Geophysical Union 1988