Discussion “Structural analysis and seismic stratigraphy for delineation of Neoproterozoic–Cambrian petroleum system in central and eastern part of Bikaner–Nagaur basin, India” by A. Mandal, D. Saha and A. Kumar, Journal of Petroleum Exploration and Production Technology, 2021, p. 1–17 (https://doi.org/10.1007/s13202-0210-01432-7)