Rock name Index SiO2 Al2O3 Fe2O3 FeO MgO CaO Na2O K2O Syenite 1 61.7 15.1 2 2.3 3.7 4.6 4.4 4.5 Syenite 2 58.3 17.9 3.2 1.7 1.5 3.7 5.9 5.3 Syenite 3 51.2 17.6 3.5 4.3 3.2 4.5 5.7 4.4 Monzonite 4 54.4 14.3 3.3 4.1 6.1 7.7 3.4 4.2 Diorite 5 58 15.7 0.7 2.8 5 10.9 3 3.2 Diorite 6 46.9 15.9 2.9 10 7 9.6 2.7 0.7 Diorite 7 58 17.3 2.2 3.8 2.2 4.3 4.3 4.1 Quartz diorite 8 55.5 16.5 1.7 4.6 6.7 6.7 3.2 2.5 Gabbro 9 55.4 15.3 2.7 5.5 5.8 9.9 2.9 1.5 Gabbro 10 55.9 13.5 2.7 5.9 6.5 8.9 2.4 1.7 Norite 11 47.2 14.5 1.6 13.8 5.2 8.1 3.1 1.2 Norite 12 48.2 18.3 1.3 6.1 10.8 9.4 1.3 0.7 Hypersthene gabbro 13 44.8 18.8 2.2 4.7 11.3 14.6 0.9 0.1 Hypersthene gabbro 14 47 14.1 0.8 15 16 2.3 0.4 1.7 Syenite 15 59.8 17.3 3.6 1.6 1.2 3.8 5 5.1 Quartz syenite 16 66.2 16.2 2 0.2 0.8 1.3 6.5 5.8 Altered syenitea 17 50 9.9 3.5 5 11.9 8.3 2.4 5 Monzonite 18 57.4 18.5 3.7 2.1 1.7 6.8 4.5 3.7 Monzonite 19 59.8 15.8 3.8 3.3 2.2 3.9 3 4.4 Diabase 20 52.2 18.2 3.3 4.4 4.7 6.5 4.6 1.9