Fig. 2From: Ooidal ironstones in the Meso-Cenozoic sequences in western Siberia: assessment of formation processes and relationship with regional and global earth processesLithostratigraphic columns representing two drilling wells, 570 and 803, through the Bakchar ironstone deposit (for locations see Fig. 1b), with relevant stratigraphic details, occurrence of ironstones, and sample positionsBack to article page