Figure 9. Evolution of ancient segments of sialic crust in the time interval 2.92-2.83 Ga. 1 - crust older than 2.92 Ga; 2-4 - greenstone belts: 2 - with mafic-ultramafic assemblages, 3 - with calc-alkaline volcanism, 4 - with bimodal volcanism; 5 - depositional basins; 6 - tonalite-trondhjemite-granodiorite series intrusions; 7 - gabbro-diorite and diorite intrusions; 8 - granite intrusions; 9 - metamorphism manifested in this time interval.