Cenozoic
Quaternary
Holocene
Pleistocene
Late Pleistocene
Middle Pleistocene
Calabrian
0.6 Ma
Cenozoic
Quaternary
Pleistocene
Calabrian
Gelasian
Neogene
Pliocene
Piacenzian
Zanclean
Miocene
Messinian
Tortonian
312.5 Ma
Paleozoic
Carboniferous
Pennsylvanian
Bashkirian
2.7 Ma
Paleozoic
Carboniferous
Mississippian
Serpukhovian
Visean
2.1 Ma
Paleozoic
Carboniferous
Mississippian
Visean
Tournaisian
Devonian
Late Devonian
Famennian
Frasnian
Middle Devonian
Givetian
0.3 Ma
Paleozoic
Devonian
Middle Devonian
Givetian
2.7 Ma
Paleozoic
Devonian
Middle Devonian
Eifelian
39.5 Ma
Paleozoic
Silurian
Wenlock
Sheinwoodian
Llandovery
Telychian
Aeronian
Rhuddanian
5.3 Ma
Paleozoic
Ordovician
Late Ordovician
Katian
Sandbian
Middle Ordovician
Darriwilian
19.8 Ma
Paleozoic
Ordovician
Early Ordovician
Tremadocian
Cambrian
Furongian
Stage 10
Jiangshanian
Paibian
Series 3
Guzhangian
Drumian
Stage 5
Series 2
Stage 4
Stage 3
Terreneuvian
Stage 2
Fortunian
536.2 Ma
Mesoproterozoic
Stenian
Ectasian
Calymmian
Paleoproterozoic
Statherian