Geologic Time Periods

Eon	Era	Period	Epoch		Length in Years
Phanerozoic	Cenozoic	Quaternary	Holocene		0 - 11,700
			Late Pleistocene		11,260 - 11,700
			Middle Pleistocene		0.3 - 0.8 Mio.
			Early Pleistocene		0.8 - 1.8 Mio.
			Gelasium		1.8 - 2.6 Mio.
		Tertiary	Neogene	Pliocene	2.6 - 5.3 Mio.
				Miocene	5.3 - 23 Mio.
			Palaeogene	Oligocene	23 - 34 Mio.
				Eocene	34 - 56 Mio.
				Palaeocene	56 - 66 Mio.
	Mesozoic	Cretaceous	Late Cretaceous		66 - 140 Mio.
			Lower Cretaceous
		Jurassic	Late Jurassic		140 - 210 Mio.
			Middle Jurassic
			Early Jurassic
		Triassic	Late Triassic		210 - 250 Mio.
			Middle Triassic
			Early Triassic
	Palaeozoic	Permian	Late Permian		250 - 290 Mio.
			Early Permian
		Carboniferous	Late Carboniferous		290 - 360 Mio.
			Early Carboniferous
		Devonian	Late Devonian		360 - 410 Mio.
			Early Devonian
		Silurian	Late Silurian		410 - 440 Mio.
			Early Silurian
		Ordovician	Late Ordovician		440 - 500 Mio.
			Middle Ordovician
			Early Ordovician
		Cambrian	Late Cambrian		500 - 590 Mio.
			Middle Cambrian
			Early Cambrian
	Precambrian	Proterozoic			590 Mio. - 2.5 Bio.
		Archaicum			2.5 - 4.6 Bio.