Cenozoic
Quaternary
Holocene
Pleistocene
Late Pleistocene
Middle Pleistocene
Calabrian
Gelasian
161.8 Ma
Mesozoic
Jurassic
Middle Jurassic
Callovian
Bathonian
Bajocian
Aalenian
Early Jurassic
Toarcian
Pliensbachian
Sinemurian
179.3 Ma
Paleozoic
Devonian
Late Devonian
Frasnian
Middle Devonian
Givetian
5.4 Ma
Paleozoic
Devonian
Middle Devonian
Eifelian
Early Devonian
Emsian
Pragian
Lochkovian
2.1 Ma
Paleozoic
Devonian
Early Devonian
Lochkovian
2.1 Ma
Paleozoic
Devonian
Early Devonian
Lochkovian
Silurian
Pridoli
Ludlow
Ludfordian
Gorstian
Wenlock
Homerian
Sheinwoodian
Llandovery
Telychian
Aeronian
18.3 Ma
Paleozoic
Ordovician
Late Ordovician
Sandbian
Middle Ordovician
Darriwilian
3.2 Ma
Paleozoic
Ordovician
Middle Ordovician
Darriwilian
Dapingian
Early Ordovician
Floian
Tremadocian
Cambrian
Furongian
Stage 10