മേഘാലയൻ

വിക്കിപീഡിയ, ഒരു സ്വതന്ത്ര വിജ്ഞാനകോശം.
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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
Notes and references[1][2]
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.

ജിയോളജിക് ടൈം സ്കെയിലിൽ ക്വാട്ടേർണറിയുടെ ഏറ്റവും പുതിയ യുഗമോ ഏറ്റവും ഉയർന്ന ഘട്ടമോ ആണ് മേഘാലയൻ.[3] ഹോളോസീൻ യുഗത്തിലെ ഏറ്റവും പുതിയത് കാലഘട്ടം കൂടിയാണിത്.[4][5]

അവലംബം[തിരുത്തുക]

  1. 1.0 1.1 1.2 Cohen, K. M.; Finney, S. C.; Gibbard, P. L.; Fan, J.-X. (January 2020). "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy. ശേഖരിച്ചത് 23 February 2020.
  2. 2.0 2.1 Mike Walker; മറ്റുള്ളവർക്കൊപ്പം. (December 2018). "Formal ratification of the subdivision of the Holocene Series/Epoch (Quaternary System/Period)" (PDF). Episodes. Subcommission on Quaternary Stratigraphy (SQS). 41 (4): 213–223. doi:10.18814/epiiugs/2018/018016. ശേഖരിച്ചത് 11 November 2019. This proposal on behalf of the SQS has been approved by the International Commission on Stratigraphy (ICS) and formally ratified by the Executive Committee of the International Union of Geological Sciences (IUGS).
  3. Cohen, Kim Mikkel, David A. T. Harper, Philip Leonard Gibbard, and Junxuan Fan. "The ICS International Chronostratigraphic Chart". International Commission on Stratigraphy. ശേഖരിച്ചത് 15 July 2018.
  4. "Scientists call our era the Meghalayan Age. Here's what the world was like when it began".
  5. "'Meghalayan Age': Latest phase in Earth's history named after Indian state, began 4,200 years ago".

പുറത്തേക്കുള്ള കണ്ണികൾ[തിരുത്തുക]

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