TY JOUR TI Early Asselian cyanobacteria and algae in the organogenic buildups of the section «Pisanyi Kamen’» (Un’ya River, Northern Urals) KW Northern Urals KW organogenic buildups KW Lower Permian KW cyanobacteria KW ancient algae JO Vestnik of geosciences AU Matveeva, N.A. AU Ivanova, R.M. PY 2025 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"