Geological units

Upper Triassic (Triassic )

Valanginian (Cretaceous / Lower Cretaceous )

Visean (Carboniferous / Mississippian )

Wenlock (Silurian )

Wordian (Permian / Guadalupian )

Wuchiapingian (Permian / Lopingian )

Ypresian (Paleogene / Eocene )

Zanclean (Neogene / Pliocene )