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Now, carbon dating has confirmed that two samples sent from the site are indeed nearly 2,200 years old.
The Keezhadi dig that started in 2013 provides archaeological evidence of ancient Tamil life that has so far been known largely from texts like Sangam literature.
We zeroed in on Keezhadi after studying both banks of Vaigai river through its entire stretch from Western Ghats till the point it reaches the Bay of Bengal,” he says.
Because carbon-14 decays at this constant rate, an estimate of the date at which an organism died can be made by measuring the amount of its residual radiocarbon.Instead, tissue carbon-14 levels are directly compared to levels in a rapidly changing atmosphere.Using biological knowledge of the timing of a particular tissue's formation, one calculates the year of birth or death of the organism from which the tissue was derived.While replying to DMK MP Kanimozhi in the Rajya Sabha on Thursday, the Union Ministry of Culture informed the Upper House that the Archaeological Survey of India had sent two carbon samples from Keezhadi for carbon dating to Beta Analytic Inc., Florida, USA.“Radio Carbon dating suggests that the samples go back to 2,160 30 years and 2,200 30 years,” stated the Ministry.Archaeologists found deposits up to 4.5 metres deep and the samples (of carbon elements) sent for carbon dating were from the middle part – i.e.