“ They have an elevation of 1500 to 4500 ft., nowhere exceeding 5000 ft. Geologically they give their name to the “Vindhyan formation,” one of the recognized rock systems of India. In legendary tradition they formed the demarcating line between the Madyadesha or middle land of the Sanskrit invaders and the non-Aryan Deccan, and they are still largely inhabited by aboriginal races such as the Bhils. ”