Steps million years | Age intervals based on isotope-geochronological Dating data (million years) | The estimated age of the superplume manifestation, million years | |||
Sedimentary and mud-volcanic formations | The volcanic rocks of basic-ultrabasic series | The plutonic ultrabasite-basite complexes | Volcanites of intermediate-acid composition | ||
Early 1600-810 | 1600-850 | 1100-900 | 1100-840 | 840-810 | 1000 and 850 |
Middle 900-650 | 900-850 | 830-650 | 830-675 | 850-650 | 850 and 730 |
Late 700-550 | 665-585 | 700-550 | 618-585 | 650-590 | 730 and 610 |