Title: Opornyĭ razrea ordovika Paĭ-Khoi︠a︡, Vaĭgacha i i︠u︡ga Novoĭ Zemli
Subjects: Stratigraphic Geology, Geology
Places: Russia (Federation), Arkhangelʹskai︠a︡ oblastʹ
Time periods: Ordovician