| |||
Arenigian stage (MichaelBurov); Arenig Series (MichaelBurov); Arg (MichaelBurov); Arenigian sequence (MichaelBurov); Arenig (MichaelBurov) | |||
Arenig (ордовикской системы); Arenigian (ордовикской системы) | |||
Arenigian Series (MichaelBurov); Arenig stage (MichaelBurov) |
аренигский ярус: 2 phrases in 1 subject |
Geology | 2 |