geol. |
Lower Llanvirn (MichaelBurov); Lower Llanvirnian Stage (MichaelBurov); Lower Llanvirn Stage (MichaelBurov); Lower Llanvirnian (MichaelBurov); Early Llanvirnian Age (MichaelBurov); Early Llanvirn Age (MichaelBurov); Early Llarvirnian (MichaelBurov); Early Llarvirn (MichaelBurov) |