Fig. 2From: The floristic relationship between the upland and lowland Carboniferous wetlands of Variscan Euramerica — Evidence from some medullosalean pteridosperm frondsSummary of the currently accepted correlations between the IUGS Global Chronostratigraphy and the Heerlen Regional Chronostratigraphy, and the macrofloral biozones referred to in this paper. Adapted from Cleal (2018, his Fig. 3)Back to article page