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.
5-533: '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
10-615: Is the first stage of the Holocene epoch. The preboreal oscillation was a short (ca. 150 years) cooling episode within the preboreal. The Preboreal was an informal subdivision of the Holocene, and as stratigraphy and dating techniques have improved since this 1972 proposal the dates would be different if proposed today. Instead others have begun to use the terms Early, Middle and Late, which would be Lower, Middle and Upper in respect of Holocene sediments. If this terminology were to be used
15-905: The Gelasian Age and the Calabrian Age . While the Gelasian and the Calabrian have officially been defined by the International Union of Geological Sciences (IUGS) to effectively constitute the Early Pleistocene, the succeeding Chibanian and Tarantian ages have yet to be ratified. These proposed ages are unofficially termed the Middle Pleistocene and Late Pleistocene respectively. The Chibanian provisionally spans time from 773 ka to 126 ka, and
20-747: The Tarantian from then until the definitive end of the whole Pleistocene, c. 9700 BC in the 10th millennium BC . Preboreal ICS stages / ages (official) Blytt–Sernander stages/ages *Relative to year 2000 ( b2k ). The Preboreal is an informal stage of the Holocene epoch. It is preceded by the Tarantian and succeeded by the Boreal . It lasted from 10,300 to 9,000 BP in radiocarbon years or 8350 BC to 7050 BC in Gregorian calendar years ( 8th millennium BC ). It
25-480: The cold Younger Dryas substage. The Early Pleistocene is an unofficial sub-epoch in the international geologic timescale in chronostratigraphy , representing the earliest division of the Pleistocene Epoch within the ongoing Quaternary Period. It is currently estimated to span the time between 2.580 ± 0.005 Ma (million years ago) and 0.773 ± 0.005 Ma. The term Early Pleistocene applies to both
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