Cenozoic
Quaternary
Holocene
Pleistocene
Late Pleistocene
Middle Pleistocene
Calabrian
Gelasian
299.9 Ma
Paleozoic
Carboniferous
Pennsylvanian
Gzhelian
Kasimovian
Moscovian
Bashkirian
18.1 Ma
Paleozoic
Carboniferous
Mississippian
Visean
Tournaisian
1.8 Ma
Paleozoic
Carboniferous
Mississippian
Tournaisian
Devonian
Late Devonian
Famennian
Frasnian
Middle Devonian
Givetian
53.3 Ma
Paleozoic
Silurian
Llandovery
Telychian
Aeronian
Rhuddanian
7.3 Ma
Paleozoic
Ordovician
Late Ordovician
Katian
Sandbian
Middle Ordovician
Darriwilian
16.0 Ma
Paleozoic
Ordovician
Early Ordovician
Floian
Tremadocian
Cambrian
Furongian
Stage 10
Jiangshanian
Paibian
Series 3
Guzhangian
Drumian
539.0 Ma
Mesoproterozoic
Stenian