وسط حیاتی دور

Subdivisions of the Quaternary Period
System/ Period	Series/ Epoch	Stage/ Age	Age
Quaternary	Holocene	Meghalayan	0	4,200
		Northgrippian	4,200	8,200
		Greenlandian	8,200	11,700
	Pleistocene	'Upper'	11,700	129سال
		Chibanian	129ka	774ka
		Calabrian	774ka	1.80سال
		Gelasian	1.80Ma	2.58Ma
Neogene	Pliocene	Piacenzian	2.58Ma	3.60Ma
Notes and references Subdivision of the Quaternary Period according to the ICS, as of January 2020. For the Holocene, dates are relative to the year 2000 (e.g. Greenlandian began 11,700 years before 2000). For the beginning of the Northgrippian a date of 8,236 years before 2000 has been set. The Meghalayan has been set to begin 4,250 years before 2000. 'Tarantian' is an informal, unofficial name proposed for a stage/age to replace the equally informal, unofficial 'Upper Pleistocene' subseries/subepoch. 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.

وسط حیاتی دور (انگریزی: Pleistocene) یا پلسٹوسینی دور؛ ان دو ادوار میں سے قدیم تر دور جس میں عصر چہارم شامل تھا، جس کی خصوصیات تلچھٹی اور برفانی اور رکازی باقیات ہیں جن میں قدیم زمانے کی انواع بھی شامل ہیں