Fig. 4. Upper Frasnian and lower Famennian lithologic column of the Syv'yu River section (upper Vorota Fm.), sampling pattern and conodont succession across the F–F boundary, with emphasis on principal biotic events and alleged Kellwasser levels (see also Figs. 7, 8); figures in the lithological column refer to microfacies photos (Figs. 5, 6).

Published as part of Yudina, Alexandra B., Racki, Grzegorz, Savage, Norman M., Racka, Maria & Małkowski, Krzysztof, 2002, The Frasnian-Famennian events in a deep-shelf succession, Subpolar Urals: biotic, depositional, and geochemical records, pp. 355-372 in Acta Palaeontologica Polonica 47 (2) on page 359, DOI: 10.5281/zenodo.13304843