Maharashtra government has notified geoglyphs and petroglyphs in Ratnagiri as 'protected monuments'.
This is 'protected under the Maharashtra Ancient Monuments and Archaeological Sites and Remains Act, 1960.
The group of petroglyphs at Deud, Ratnagiri, dates back to the Mesolithic era (roughly 20,000-10,000 years ago).
Geoglyphs and petroglyphs are different types of ancient art forms, both involving the creation of images or designs on the earth's surface or rock surfaces.