The ca. 3.5 Ga Steynsdorp gneisses crop out in the core of the Steynsdorp antiform in the South of the Barberton Greenstone Belt. The contact between the belt and the gneisses is, in this place, a clearly tectonic contact with gneisses-up, greenstone-down sense of shear.
Lana, C., Kisters, A., Stevens, G., 2010. Exhumation of Mesoarchean TTG gneisses from the middle crust: Insights from the Steynsdorp core complex, Barberton granitoid-greenstone terrain, South Africa. Bulletin of the Geological Society of America 122, 183.