Complex sentence: It is structurally dominated by three north-dipping, fault--bound units stacked by the South Tibetan Detachment, the Main Central Thrust, the Main Boundary Thrust and the Main Frontal Thrust.
Split into simpler sentences: It is structurally dominated by three north-dipping, fault--bound geological units stacked on each other. The major faults are South Tibetan Detachment, the Main Central Thrust, the Main Boundary Thrust and the Main Frontal Thrust.