Sangam period

Tamil Sangam Dates 4140 to 14,000 BC

Ramanis blog / 6 Jul 2017

Assuming ,at the most conservative level ,that the Tsunami struck immediately before Silappadikaram period,which is unlikely as to reconstruct the Land and take the language to classical level of Silappadikaram would have required at least five thousand years,we can assign the last Tsunami at 14,000 BC.

And taking the account of Tamil classics for the duration of each Sangam at ( there is novreason to doubt this as their version about Third Tsunami is validated,

Hinduism

Madurai Dated 3 BC Chess Pieces Roman Coins Found

Ramanis blog / 20 Oct 2016

Archaeologists opine that it could date back to another 10,000 years back.

Burnt Bricks used to Build houses, Chess Pieces, Micro Pearls, intricate potteries were found.

Archaeological report.

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At Keezhadi, a village not far from the southern bank of the Vaigai river near Madurai, the Archeological Survey of India (ASI) is undertaking a massive excavation, possibly its biggest to date in Tamil Nadu. Already 42 trenches have been dug in two locations in a coconut grove at a place called Pallichandai Thidal in the village.