Present	0	0
Phanerozoic	543.9	0
Phanerozoic.Cenozoic	65	0
Phanerozoic.Cenozoic.Quaternary	1.64	0
Phanerozoic.Cenozoic.Quaternary.Holocene	0.01	0
Phanerozoic.Cenozoic.Quaternary.Pleistocene	1.64	0.01
Phanerozoic.Cenozoic.Tertiary	65	1.64
Phanerozoic.Cenozoic.Tertiary.Neogene	23.3	1.64
Phanerozoic.Cenozoic.Tertiary.Neogene.Pliocene	5.2	1.64
Phanerozoic.Cenozoic.Tertiary.Neogene.Miocene	23.3	5.2
Phanerozoic.Cenozoic.Tertiary.Paleogene	65	23.3
Phanerozoic.Cenozoic.Tertiary.Paleogene.Oligocene	35.4	23.3
Phanerozoic.Cenozoic.Tertiary.Paleogene.Eocene	56.5	35.4
Phanerozoic.Cenozoic.Tertiary.Paleogene.Paleocene	65	56.5
Phanerozoic.Mesozoic	251	65
Phanerozoic.Mesozoic.Cretaceous	144.8	65
Phanerozoic.Mesozoic.Jurassic	199.6	144.8
Phanerozoic.Mesozoic.Triassic	251	199.6
Phanerozoic.Paleozoic	543.9	251
Phanerozoic.Paleozoic.Permian	300	251
Phanerozoic.Paleozoic.Carboniferous	355	300
Phanerozoic.Paleozoic.Carboniferous.Pennsylvanian	314	300
Phanerozoic.Paleozoic.Carboniferous.Mississippian	355	314
Phanerozoic.Paleozoic.Devonian	418	355
Phanerozoic.Paleozoic.Silurian	443	418
Phanerozoic.Paleozoic.Ordovician	495	443
Phanerozoic.Paleozoic.Cambrian	543.9	495
Proterozoic	2500	543.9
Archean	3800	2500
Hadean	4400	3800