Meghalayan
Third stage of the Holocene epoch / From Wikipedia, the free encyclopedia
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The Meghalayan age is the name given in 2018, by the International Commission on Stratigraphy, to the current age or latest geologic age – or uppermost stage of the Quaternary.[3] It is also the upper, or latest, of three subdivisions of the Holocene epoch or series.[4][5] This way of breaking down time is based only on geology; for example, it is unrelated to the three-age system of historical periods into which human development is sometimes divided.
Meghalayan | ||||||
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0.0042 – 0 Ma | ||||||
Chronology | ||||||
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Etymology | ||||||
Name formality | Formal | |||||
Name ratified | 14 June 2018[1][2] | |||||
Usage information | ||||||
Celestial body | Earth | |||||
Regional usage | Global (ICS) | |||||
Time scale(s) used | ICS Time Scale | |||||
Definition | ||||||
Chronological unit | Age | |||||
Stratigraphic unit | Stage | |||||
Time span formality | Formal | |||||
Lower boundary definition | 4.2 kiloyear event | |||||
Lower boundary GSSP | Mawmluh Cave, Meghalaya, India 25.2622°N 91.7150°E / 25.2622; 91.7150 | |||||
Lower GSSP ratified | 14 June 2018 | |||||
Upper boundary definition | Ongoing | |||||
Upper boundary GSSP | N/A | |||||
Upper GSSP ratified | N/A |
The Meghalayan begins 4,200 years BP (c. 2251 BCE or 7750 HE),[6] leaving room for the possible introduction of the Anthropocene.[7][8] Helama & Oinonen (2019) dated the start of the Meghalayan to 2190–1990 BCE.[9] The age began with a 200-year drought that impacted human civilizations in the Eastern Mediterranean, Mesopotamia, the Indus Valley and the Yangtze River Valley.[6] "The fact that the beginning of this age coincides with a cultural shift caused by a global climate event makes it unique," according to Stanley Finney, Secretary General of the International Union of Geological Sciences.[8]