Precambrian metamorphic rocks, composed of granulite-facies sequences intruded by granites and pegmatites, are overlain by the Permian sedimentary Amery Group.
pɹɪkˈæmbɹiən mˌɛɾəmˈoːɹfɪk ɹˈɑːks, kəmpˈoʊzd ʌv ɡɹˈænuːlˌaɪtfˈeɪsiz sˈiːkwənsᵻz ɪntɹˈuːdᵻd baɪ ɡɹˈænɪts ænd pˈɛɡmɐtˌaɪts, ɑːɹ ˌoʊvɚlˈeɪn baɪ ðə pˈɜːmiən sˌɛdɪmˈɛntɚɹi ˈeɪmɚɹi ɡɹˈuːp.