(A) Fossil locality (red dot) in Nanjing, eastern China. (B) Stratigraphic column showing the fossiliferous strata, strata for isotopic dating, and layers (XW010 to XW014) sampled for palynological dating. (C) Type locality (red asterisk, N32˚08′ 19″, E118˚58′ 20″) of Nanjinganthus in the suburbs of Nanjing, China. (D) Geological map of the region near the type locality, dark green represents the outcrop of the Xiangshan Group. (E) Fossiliferous strata (red line) of the South Xiangshan Formation exposed in the quarry of Xiaoyetian Cement Company Ltd. Note one of the strata (red line) yielding many flowers of Nanjinganthus. (F–G) Comparison of relative probability plot of zircon data (F: all data; G: concordance >90%). (H) Close-up of one of the Nanjinganthus-yielding layers (red line).