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