Figure 1. Schematic map of the Late Riphean-Ordovician tectonic evolution of Kazakhstan and northern Tien-Shan.
1 - Oceanic crust, 2 - continental crust, 3 - oceanic crust basalts, 4 - suboceanic basalts of continental rifts, 5 - ensimatic island arc rocks: (a) volcanic rocks, (b) tephroturbidite; (6-7) island arcs with transitional and continental crust; (6) differentiated volcanics (a) and tephroturbidites (b); (7) contrastingly differentiated volcanics and their tuffs; (8) continental, mainly acid, volcanics; (9) olistostroms; (10) siliceous and clayey-siliceous rocks; (11) limestones, (12) terrigenous, mainly quartzose, deposits.