Fig. 2From: A new Bergeria (Flemingitaceae) from the Mississippian of Xinjiang, NW China and its evolutionary implicationsStratigraphic column of the Akeshake Formation of Mississippian (upper Visean), showing the stratigraphic position of the fossil. The vertical thickness is not to scale, with thickness of each layer marked respectively. The stratigraphic data is cited from XBGMR (1993)Back to article page