Fig. 3From: The Callovian and Late Jurassic ammonite-based chronostratigraphy of West Siberia: important findings, biostratigraphic review, and basin correlation West Siberia-South EnglandThe ammonite zonation of the Callovian and Oxfordian stages. Zonal succession established by authors (right column) and another one used by Russian geological services (Nesterov 2004; left column). North-West European zonation and its correlation with the West Siberian one is shown according to Ogg and Hinnov (2012) and Nikitenko et al. (2015)Back to article page