| Holocene |
| Pleistocene |
| Quaternary |
| Pliocene - Pleistocene |
| Pliocene - Quaternary |
| Pliocene |
| Miocene |
| Neogene - Quaternary |
| Neogene |
| Oligocene - Miocene |
| Oligocene |
| Eocene - Pliocene |
| Eocene - Miocene |
| Eocene - Oligocene |
| Eocene |
| Palaeocene - Eocene |
| Palaeocene |
| Palaeogene - Pleistocene |
| Palaeogene - Neogene |
| Palaeogene - Miocene |
| Palaeogene |
| Cenozoic |
| Late Cretaceous |
| Late Cretaceous - Miocene |
| Late Cretaceous - Neogene |
| Late Cretaceous - Eocene |
| Late Cretaceous - Paleocene |
| Late Cretaceous - Palaeogene |
| Early Cretaceous |
| Cretaceous - Miocene |
| Cretaceous - Neogene |
| Cretaceous - Eocene |
| Cretaceous - Palaeocene |
| Cretaceous - Palaeogene |
| Cretaceous |
| Late Jurassic |
| Late Jurassic - Early Cretaceous |
| Late Jurassic - Cretaceous |
| Middle Jurassic - Late Cretaceous |
| Middle Jurassic - Late Jurassic |
| Middle Jurassic |
| Early - Middle Jurassic |
| Early Jurassic |
| Jurassic - Neogene |
| Jurassic - Eocene |
| Jurassic - Palaeogene |
| Jurassic - Early Cretaceous |
| Jurassic - Cretaceous |
| Jurassic |
| Alpine |
| Late Triassic - Cretaceous |
| Late Triassic - Early Jurassic |
| Late Triassic - Middle Jurassic |
| Late Triassic - Jurassic |
| Late Triassic |
| Middle Triassic - Late Triassic |
| Middle Triassic |
| Early - Middle Triassic |
| Early Triassic |
| Triassic - Miocene |
| Triassic - Eocene |
| Triassic - Early Cretaceous |
| Triassic - Cretaceous |
| Triassic - Early Jurassic |
| Triassic - Middle Jurassic |
| Triassic - Jurassic |
| Triassic |
| Mesozoic - Neogene |
| Mesozoic - Cenozoic |
| Mesozoic |
| Late Permian - Early Triassic |
| Late Permian |
| Early - Middle Permian |
| Permian - Palaeogene |
| Permian - Cretaceous |
| Permian - Middle Jurassic |
| Permian - Jurassic |
| Permian - Early Triassic |
| Permian - Middle Triassic |
| Permian - Triassic |
| Permian |
| Late Carboniferous - Middle Permian |
| Late Carboniferous - Permian |
| Late Carboniferous |
| Early Carboniferous |
| Carboniferous - Middle Permian |
| Carboniferous - Permian |
| Carboniferous |
| Late Devonian - Late Carboniferous |
| Late Devonian - Early Carboniferous |
| Late Devonian - Carboniferous |
| Late Devonian |
| Middle Devonian - Early Carboniferous |
| Middle Devonian - Carboniferous |
| Middle Devonian - Late Devonian |
| Middle Devonian |
| Variscan |
| Early - Middle Devonian |
| Early Devonian |
| Devonian - Permian |
| Devonian - Early Carboniferous |
| Devonian - Carboniferous |
| Devonian |
| Late Silurian - Devonian |
| Late Silurian |
| Wenlock - Middle Devonian |
| Wenlock - Early Devonian |
| Early Silurian |
| Silurian - Permian |
| Silurian - Middle Devonian |
| Silurian - Early Devonian |
| Silurian - Devonian |
| Silurian |
| Late Ordovician - Early Devonian |
| Late Ordovician - Llandovery |
| Late Ordovician - Silurian |
| Late Ordovician |
| Middle Ordovician - Middle Devonian |
| Middle Ordovician - Silurian |
| Middle Ordovician |
| Middle Ordovician - Devonian |
| Early - Middle Ordovician |
| Early Ordovician |
| Ordovician - Permian |
| Ordovician - Early Carboniferous |
| Ordovician - Carboniferous |
| Ordovician - Devonian |
| Ordovician - Llandovery |
| Ordovician - Silurian |
| Ordovician - Early Devonian |
| Ordovician |
| Late Cambrian - Middle Ordovician |
| Late Cambrian - Early Ordovician |
| Late Cambrian - Ordovician |
| Middle - Late Cambrian |
| Early - Middle Cambrian |
| Early Cambrian |
| Cambrian - Triassic |
| Cambrian - Carboniferous |
| Cambrian - Devonian |
| Cambrian - Silurian |
| Cambrian - Middle Ordovician |
| Cambrian - Early Ordovician |
| Cambrian - Ordovician |
| Cambrian |
| Palaeozoic - Triassic |
| Palaeozoic - Mesozoic |
| Palaeozoic |
| Phanerozoic |
| Proterozoic III - Devonian |
| Proterozoic III - Silurian |
| Proterozoic III - Ordovician |
| Proterozoic III - Middle Cambrian |
| Proterozoic III - Early Cambrian |
| Proterozoic III - Cambrian |
| Proterozoic III - Palaeozoic |
| Proterozoic III |
| Proterozoic II |
| Proterozoic II - Proterozoic III |
| Proterozoic I - Proterozoic III |
| Proterozoic I - Proterozoic II |
| Proterozoic I |
| Proterozoic - Carboniferous |
| Proterozoic - Devonian |
| Proterozoic - Silurian |
| Proterozoic - Ordovician |
| Proterozoic - Cambrian |
| Proterozoic - Palaeozoic |
| Proterozoic |
| Cadomian |
| Caledonian |
| Archean - Cambrian |
| Archean - Proterozoic I |
| Archean |
| Precambrian - Cenozoic |
| Precambrian - Cambrian |
| Precambrian - Palaeozoic |
| Precambrian |
| undifferentiated |
| unknown |
| Holocene |
| Pleistocene |
| Quaternary |
| Pliocene - Pleistocene |
| Pliocene - Quaternary |
| Pliocene |
| Miocene |
| Neogene - Quaternary |
| Neogene |
| Oligocene - Miocene |
| Oligocene |
| Eocene - Pliocene |
| Eocene - Miocene |
| Eocene - Oligocene |
| Eocene |
| Palaeocene - Eocene |
| Palaeocene |
| Palaeogene - Pleistocene |
| Palaeogene - Neogene |
| Palaeogene - Miocene |
| Palaeogene |
| Cenozoic |
| Late Cretaceous |
| Late Cretaceous - Miocene |
| Late Cretaceous - Neogene |
| Late Cretaceous - Eocene |
| Late Cretaceous - Paleocene |
| Late Cretaceous - Palaeogene |
| Early Cretaceous |
| Cretaceous - Miocene |
| Cretaceous - Neogene |
| Cretaceous - Eocene |
| Cretaceous - Palaeocene |
| Cretaceous - Palaeogene |
| Cretaceous |
| Late Jurassic |
| Late Jurassic - Early Cretaceous |
| Late Jurassic - Cretaceous |
| Middle Jurassic - Late Cretaceous |
| Middle Jurassic - Late Jurassic |
| Middle Jurassic |
| Early - Middle Jurassic |
| Early Jurassic |
| Jurassic - Neogene |
| Jurassic - Eocene |
| Jurassic - Palaeogene |
| Jurassic - Early Cretaceous |
| Jurassic - Cretaceous |
| Jurassic |
| Alpine |
| Late Triassic - Cretaceous |
| Late Triassic - Early Jurassic |
| Late Triassic - Middle Jurassic |
| Late Triassic - Jurassic |
| Late Triassic |
| Middle Triassic - Late Triassic |
| Middle Triassic |
| Early - Middle Triassic |
| Early Triassic |
| Triassic - Miocene |
| Triassic - Eocene |
| Triassic - Early Cretaceous |
| Triassic - Cretaceous |
| Triassic - Early Jurassic |
| Triassic - Middle Jurassic |
| Triassic - Jurassic |
| Triassic |
| Mesozoic - Neogene |
| Mesozoic - Cenozoic |
| Mesozoic |
| Late Permian - Early Triassic |
| Late Permian |
| Early - Middle Permian |
| Permian - Palaeogene |
| Permian - Cretaceous |
| Permian - Middle Jurassic |
| Permian - Jurassic |
| Permian - Early Triassic |
| Permian - Middle Triassic |
| Permian - Triassic |
| Permian |
| Late Carboniferous - Middle Permian |
| Late Carboniferous - Permian |
| Late Carboniferous |
| Early Carboniferous |
| Carboniferous - Middle Permian |
| Carboniferous - Permian |
| Carboniferous |
| Late Devonian - Late Carboniferous |
| Late Devonian - Early Carboniferous |
| Late Devonian - Carboniferous |
| Late Devonian |
| Middle Devonian - Early Carboniferous |
| Middle Devonian - Carboniferous |
| Middle Devonian - Late Devonian |
| Middle Devonian |
| Variscan |
| Early - Middle Devonian |
| Early Devonian |
| Devonian - Permian |
| Devonian - Early Carboniferous |
| Devonian - Carboniferous |
| Devonian |
| Late Silurian - Devonian |
| Late Silurian |
| Wenlock - Middle Devonian |
| Wenlock - Early Devonian |
| Early Silurian |
| Silurian - Permian |
| Silurian - Middle Devonian |
| Silurian - Early Devonian |
| Silurian - Devonian |
| Silurian |
| Late Ordovician - Early Devonian |
| Late Ordovician - Llandovery |
| Late Ordovician - Silurian |
| Late Ordovician |
| Middle Ordovician - Middle Devonian |
| Middle Ordovician - Silurian |
| Middle Ordovician |
| Middle Ordovician - Devonian |
| Early - Middle Ordovician |
| Early Ordovician |
| Ordovician - Permian |
| Ordovician - Early Carboniferous |
| Ordovician - Carboniferous |
| Ordovician - Devonian |
| Ordovician - Llandovery |
| Ordovician - Silurian |
| Ordovician - Early Devonian |
| Ordovician |
| Late Cambrian - Middle Ordovician |
| Late Cambrian - Early Ordovician |
| Late Cambrian - Ordovician |
| Middle - Late Cambrian |
| Early - Middle Cambrian |
| Early Cambrian |
| Cambrian - Triassic |
| Cambrian - Carboniferous |
| Cambrian - Devonian |
| Cambrian - Silurian |
| Cambrian - Middle Ordovician |
| Cambrian - Early Ordovician |
| Cambrian - Ordovician |
| Cambrian |
| Palaeozoic - Triassic |
| Palaeozoic - Mesozoic |
| Palaeozoic |
| Phanerozoic |
| Proterozoic III - Devonian |
| Proterozoic III - Silurian |
| Proterozoic III - Ordovician |
| Proterozoic III - Middle Cambrian |
| Proterozoic III - Early Cambrian |
| Proterozoic III - Cambrian |
| Proterozoic III - Palaeozoic |
| Proterozoic III |
| Proterozoic II |
| Proterozoic II - Proterozoic III |
| Proterozoic I - Proterozoic III |
| Proterozoic I - Proterozoic II |
| Proterozoic I |
| Proterozoic - Carboniferous |
| Proterozoic - Devonian |
| Proterozoic - Silurian |
| Proterozoic - Ordovician |
| Proterozoic - Cambrian |
| Proterozoic - Palaeozoic |
| Proterozoic |
| Cadomian |
| Caledonian |
| Archean - Cambrian |
| Archean - Proterozoic I |
| Archean |
| Precambrian - Cenozoic |
| Precambrian - Cambrian |
| Precambrian - Palaeozoic |
| Precambrian |
| undifferentiated |
| unknown |