 The Rauer Islands terrane, composed of the Rauer Group granulite gneisses, are Late Proterozoic (1106 Ma).Numerous mafic dykes are present in the Vestfold Hills and Napier Complex, and were emplaced between about 1200 to 1400 Ma.Massive charnockite bodies are present in the East Antarctica complex Proterozoic mobile belts, indicating a batholith intruded the supracrustal basement gneiss around 1000 Ma.