The Vindhyas is a range of mountains in central India logically separating the northern parts with the southern India.The western end of the range rises in eastern Gujarat state, near the border with Madhya Pradesh, and the range runs east and north nearly to the Ganges river at Mirzapur. The southern slopes of the range are drained by the Narmada river, which drains westward to the Arabian Sea.The Vindhyan tableland is a plateau that lies to the north of the central part of the range. The cities of Bhopal and Indore lie on the tableland, which rises higher than the Indo-Gangetic plain to its north. Aligned in a southwest-northeast band, the average height of the range is above 1000 m/3,280 ft.
Vindhya Range is a range of older rounded mountains and hills in the west-central Indian subcontinent, which geographically separates the Indian subcontinent into northern India
(the Indo-Gangetic plain) and Southern India.
.Reaching the sub-continent proper, the range runs east and north nearly to the Ganges River at Mirzapur. The area to the north and west of the range are arid and inhospitable, located in the shadow of both the Vindhya and the higher Aravalli range to the south blocking the prevailing winds.
The southern slopes of the range are drained by the Narmada River, which proceeds westward to the Arabian Sea in the wide valley between the Vindhya Range and the parallel Satpura Range
farther to the south. 
The northern slopes of the range are drained by tributaries of the Ganges, including the Kali Sindh, Parbati, Betwa, and Ken. The Son, a tributary of the Ganges, drains the southern slopes of the range at its eastern end. The Vindhyan tableland is a plateau that lies to the north
of the central part of the range. The cities of Bhopal, the capital of Madhya Pradesh, and Indore
lie on the tableland, which rises higher than the Indo-Gangetic plain to its north.
The massive sandstone of the range, long an important building material, was used for the famous group of Buddhist stupas at Sanchi (built 3d cent. B.C.–11th cent. A.D.), the 11th-century Jain and Brahman temples at Khajuraho, and the 15th-century palaces of Gwalior .It lies at the foot of Gwalior fort, a stronghold on the Rock of Gwalior, a plateau 2 mi (3.2 km) long and 300 ft (91 m) high. Within the battlemented walls of the fort are elaborately carved palaces and temples.
Situated in the Vindhya Mountain Range of Madhya Pradesh, is Bandhavgarh National The park has got mixed variety of forest. 
.Almost half the national park's is covered with Sal forest, while mixed forests are found in the higher reaches of the hills in
North there are Stretches of bamboo and grasslands. Bandhavgarh National park is predominantly it is rugged and hilly.
One interesting news article that indicates at the age of the mountains: (Source: The Hindu: Nov 6,2007)
Findings establish contemporary evolution of Vindhya mountains:
Latest research findings about the presence of Cambrian fossils in the Vindhya mountains by Stefan Bengtson of the department of Palaeozoology, Swedish Museum of Natural History has confirmed the discovery made by R.J. Azmi of the Wadia Institute of Himalayan Geology in 1998 and put to rest the controversy thrown up by some Indian scientists who refused to believe Dr. Azmi’s findings.
The 1998 discovery of Cambrian fossils in the lower Vindhyas had created a sensation as these rocks believed to be 1400 to 1100 million years old were now being claimed to be fairly young and about 550 million years old.
Prof. Bengtson’s findings were presented at the Geological Society of America annual meeting held in Denver recently. Happy over the confirmation of his discovery by an international expert, Dr. Azmi felt that it was astonishing that Indian scientists could not confirm the findings despite having made several field visits for the purpose for nearly a decade. The presence of these small skeletal shelly fossils in the Vindhyas is part of the Cambrian explosion around the world.
In India such fossils have been found in the Mussoorie hills of the lesser Himalaya and the Vindhya mountain ranges of Central India. Their presence establishes the close sea connection and contemporary evolution of this mountain system, Dr. Azmi said.