"We found layer upon layer of spherical eggs and body parts of dinosaur and each cluster contained eight eggs," M. Ramkumar, a geologist at Periyar University who led a survey team, said yesterday, according to The Hindu newspaper.
The eggs, about 13-20cm in diameter and lying in sandy nests about 1.2m wide, were discovered during a study funded by Indian and German scientific institutions.
The clusters were under ash from volcanic eruptions on the Deccan plateau, which geologists said could have caused the dinosaurs to become extinct.
The nesting site was found along the banks and bottom of streams in the Cauvery river basin, containing clusters of fossilised eggs, dung and bone remains of dinosaurs.
"Occurrences of unhatched eggs in large numbers at different stratigraphic levels indicate that the dinosaurs kept returning to the same site for nesting," Anbarasu, another survey team member, said.
The researchers have requested local officials to cordon off the site since a similar discovery in northern India led to a plunder of the fossils.