Fig. 5From: The Callovian and Late Jurassic ammonite-based chronostratigraphy of West Siberia: important findings, biostratigraphic review, and basin correlation West Siberia-South EnglandCorrelation of the Corallian Group (modified from Talbot 1973) a and its cycles and the Vasyugan Suite of West Siberia (Pervomaiskaya Well-268) b 1 sand, 2 silt, 3 shale, 4 black shales, 5 unconformitiesBack to article page