0218 GMT July 22, 2018
The site, unearthed by freelance archeologist Kadiyala Venkateswara Rao at Kesanapalli village in Dachepalli mandal, has excited archeologists and is expected to trigger further excavations.
"The rock art site on natural lime stone is the first of its kind in the country. The motifs in the form of engraving, pecking and brushing throw fascinating insights into the social and cultural practices of ancient civilizations," Rao told The Hindu.
What has made archeologists look up this latest discovery is the dexterity with which early human was able to engrave different animal motifs like fish, snake, peacock, eagle, bull and scorpion on limestone blocks.
One petroglyph shows an anthropomorphic figure with its head in between the two hands.
Another engraving shows a warrior holding a sword and a shield, indicating the practices during Iron Age.
Rao, on a trail of discovering ancient sites, also stumbled upon a series of rock art motifs in front of an old-age home located on the left side of the path leading to the river.
"It is quite interesting to find a rare and mythical oval-shaped labyrinth engraving with multi circles by the side of cultic motifs. The labyrinth is a mythical and sacred symbol of the early prehistoric times," said Rao, who had earlier discovered a huge rock art labyrinth painting in Kolimeru cave on the top of a hill in East Godavari district.
A stupa established on the prehistoric rock art site during 1-2 BCE, was unearthed during excavations in 1969.