Fig. 2

Environmental layers used as raw data for this study. Outcrop of Campanian (a) and Maastrichtian (b) aged terrestrial sedimentary units in North America. Palaeoclimatic outputs from a General Circulation Model configured to the Late Cretaceous (Lunt et al.34) with modelled near-surface (1.5 m) annual mean air temperatures (°C) for the Campanian (c) and Maastrichtian (d). Annual mean precipitation (mm/s) for the Campanian (e) and Maastrichtian (f). Model outputs have been bilineary interpolated. All the environmental predictors and the statistical operations to select them can be found in Supplementary Note 1