Subdivisions of the Quaternary period
System	Series	Stage	Age (Ma)
Quaternary	Holocene		0–0.0117
	Pleistocene	Tarantian (Upper)	0.0117–0.126
		Ionian (Middle)	0.126–0.781
		Calabrian (Lower)	0.781–1.806
		Gelasian (Lower)	1.806–2.588
Neogene	Pliocene	Piacenzian	older
In Europe and North America, the Holocene is subdivided into Preboreal, Boreal, Atlantic, Subboreal and Subatlantic stages of the Blytt-Sernander time scale. There are many regional subdivisions for the Upper or Late Pleistocene, usually these represent locally recognized cold (glacial) and warm (interglacial) periods. The last glacial period ends with the cold Younger Dryas substage.

The Early Pleistocene (also known as Lower Pleistocene) is a subepoch in the international geologic timescale or a subseries in chronostratigraphy, being the earliest or lowest subdivision of the Quaternary period/system and Pleistocene epoch/series. It spans the time between 2.588 ± 0.005 Ma (million years ago) and 0.781 ± 0.005 Ma. The Early Pleistocene consists of the Gelasian and the Calabrian ages.

[edit] Notes

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