A study has confirmed that the fossil assemblage found at Panaiyur in Thoothukudi district dates back to the Holocene period (about 8,000–12,000 years ago).
The study was conducted by the Zoological Survey of India (ZSI) based on field research and scientific analysis.
The fossils include 104 specimens from four groups, mainly bivalves and gastropods, found near the Gulf of Mannar.
The species are similar to present-day marine organisms, showing environmental continuity over thousands of years.
The fossils indicate a shallow marine to estuarine environment with warm tropical conditions and moderate water flow.