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17-Apr-2019 06:04

The photograph of a terracotta pipe connecting two storage jars from the excavation site of Keeladi raised a common question when archaeologist Amarnath Ramakrishna showed it before a group of people druing a lecture.CHENNAI: The photograph of a terracotta pipe connecting two storage jars from the excavation site of Keeladi raised a common question when archaeologist Amarnath Ramakrishna showed it before a group of people during a lecture.The second phase began in March 2016 and went on till September.At least 5,800 artefacts including, ivory comb, semi-precious stone ornaments, terracotta peal beads, shell bangles, Brahmi-inscribed pot shreds and copper objects have been unearthed from the trenches in the first two excavations. Although a lot has been written about the Keeladi excavations, the Brahmi-inscribed pot shreds apparently got attention from heritage enthusiasts and scholars.Measuring the amount of 14C in a sample from a dead plant or animal such as piece of wood or a fragment of bone provides information that can be used to calculate when the animal or plant died.The older a sample is, the less 14C there is to be detected, and because the half-life of 14C (the period of time after which half of a given sample will have decayed) is about 5,730 years, the oldest dates that can be reliably measured by radiocarbon dating are around 50,000 years ago, although special preparation methods occasionally permit dating of older samples. He remained there as an instructor until the end of the decade.The dates range from around 21,000 to 13,800 cal BP.We show that the age of the ancient pottery ranges between 18,300 and 15,430 cal BP.

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When the animal or plant dies, it stops exchanging carbon with its environment, and from that point onwards the amount of 14C it contains begins to reduce as the 14C undergoes radioactive decay.They wanted to know what was going through the pipe.Even Amarnath, who led the excavations in Keeladi, couldn't give a clear answer.The following list of accelerator mass spectrometry facilities sets out the research centres which employ accelerator mass spectrometry (AMS).Accelerator mass spectrometry is an analytical technique that uses a full-sized particle accelerator as a big mass spectrometer.

When the animal or plant dies, it stops exchanging carbon with its environment, and from that point onwards the amount of 14C it contains begins to reduce as the 14C undergoes radioactive decay.

They wanted to know what was going through the pipe.

Even Amarnath, who led the excavations in Keeladi, couldn't give a clear answer.

The following list of accelerator mass spectrometry facilities sets out the research centres which employ accelerator mass spectrometry (AMS).

Accelerator mass spectrometry is an analytical technique that uses a full-sized particle accelerator as a big mass spectrometer.

We need to conduct scientific studies to know the usage of these terracotta pipes and furnaces," he said. A well-maintained drainage system was in place during that time," said Amarnath, who was speaking on "Keeladi excavations: An overview" at the department of ancient history and archaeology, University of Madras on Wednesday.