Geological units


Aalenian (Jurassic / Middle Jurassic )

Aeronian (Silurian / Llandovery )

Albian (Cretaceous / Lower Cretaceous )

Anisian (Triassic / Middle Triassic )

Aptian (Cretaceous / Lower Cretaceous )

Aquitanian (Neogene / Miocene )

Archaean

Artinskian (Permian / Cisuralian )

Asselian (Permian / Cisuralian )

Bajocian (Jurassic / Middle Jurassic )

Barremian (Cretaceous / Lower Cretaceous )

Bartonian (Paleogene / Eocene )

Bashkirian (Carboniferous / Pennsylvanian )

Bathonian (Jurassic / Middle Jurassic )

Berriasian (Cretaceous / Lower Cretaceous )

Burdigalian (Neogene / Miocene )

Calabrian (Quarternary / Pleistocene )

Callovian (Jurassic / Middle Jurassic )

Calymmian (Proterozoic / Mesoproterozoic )

Cambrian