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Scientists have defined a new geological time scale called "Meghalayan Age" – a period that began 4200 years ago and has experienced a sudden mega-drought and cooling around the world.
Sediments collected by an international team of researchers those from a stalagmite cave at Meghalaya helped define the smallest climatic event in the history of the Earth.
Agricultural societies that developed in several regions after the end of the last ice age were hard hit by the 200-year-old weather event that resulted in the collapse of civilizations and human migrations in Egypt, Greece, Syria, Palestine, Mesopotamia. , the Indus Valley and the Yangtze River Valley.
The climatic event of 4,200 years was observed on the seven continents.
The age of the late Holocene meghalayan has been ratified as the most recent unit of the geological scale
Two other ages: the age of the Holocene Middle North and the age of the Holocene-early Greenland with defined beginnings during the climatic events that occurred respectively about 8,300 and 11,700 years ago
includes the 39; Holocene time, which represents the time elapsed since the end of the last ice age.
The megalayan era is unique among the many intervals of the geological time scale in that Mr. Stanley Finney, professor at the State University of Long Beach in the United States United States and Secretary General of the International Union of Geological Sciences (IUGS) in France, said: "The beginning coincides with a global cultural event produced by a global climate event. on stratigraphy, which is responsible for the normalization of the geological time scale, approved the definition of the beginning of the youngest unit of the geological time scale according to the timing of this event.
UISG, for review, and the IUGS Executive Committee voted unanimously to ratify them.
Geological Scale units are based on sedimentary strata accumulated over time and containing sediment types, fossils and chemical isotopes. the pbadage of time and the physical and biological events that produced them.
The three new ages of the Holocene epoch are rep The sediments that have accumulated all over the world at the bottom of the sea, on the bottom of the lakes, in the form of glacial ice and in the form of layers of calcite in stalactites and stalagmites.
and, together, the strata of three new stages constitute the Holocene series
The lower limit of the Greenlandic and NorthGrippian stages is defined at specific levels in the ice cores of Greenland. The lower limit of the Meghalayan stadium is set at a specific level in a stalagmite of a cave in northeastern India
Ice cores and stalagmite are now identified as international geostandards and have been placed in protected archives accessible for further study.
The decision to define these new stages of the Holocene series and thus the three new corresponding ages of the Holocene epoch allows an update of the international chronostratigraphic chart, which represents the calendar of the complete geological history of the earth.
(This story was not edited by Business Standard staff and is generated automatically from a syndicated feed.)
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