ജിയോളജിക് ടൈം സ്കെയിലിൽ ക്വാട്ടേർണറിയുടെ ഏറ്റവും പുതിയ യുഗമോ ഏറ്റവും ഉയർന്ന ഘട്ടമോ ആണ് മേഘാലയൻ.[3] ഹോളോസീൻ യുഗത്തിലെ ഏറ്റവും പുതിയത് കാലഘട്ടം കൂടിയാണിത്.[4][5]
| Subdivisions of the Quaternary System | ||||
|---|---|---|---|---|
| System/ Period |
Series/ Epoch |
Stage/ Age |
Age (Ma) | |
| Quaternary | Holocene | Meghalayan | 0 | 0.0042 |
| Northgrippian | 0.0042 | 0.0082 | ||
| Greenlandian | 0.0082 | 0.0117 | ||
| Pleistocene | 'Upper' | 0.0117 | 0.129 | |
| Chibanian | 0.129 | 0.774 | ||
| Calabrian | 0.774 | 1.80 | ||
| Gelasian | 1.80 | 2.58 | ||
| Neogene | Pliocene | Piacenzian | 2.58 | 3.60 |
Subdivision of the Quaternary Period according to the ICS, as of May 2019.[1]
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.[2] The Meghalayan has been set to begin 4,250 years before 2000.[1] '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. | ||||
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