Chota Nagpur Plateau has the remains of an old fort belonging to the Nagavanshis. The Chhota Nagpur Plateau is a continental plateau—an extensive area of land thrust above the general land. The plateau has been formed by continental uplift from forces acting deep inside the earth. The Gondwana substrates attest to the plateau's ancient origin. It is part of the Deccan Plate, which broke free from the southern continent during the Cretaceous to embark on a 50-million-year journey that was violently interrupted by the northern Eurasian continent. The northeastern part of the Deccan Plateau, where this ecoregion sits, was the first area of
Plateau State Nigeria had twelve states. Following the civil war, Benue-Plateau State was one of several large states which were further split up following pressure on the Federal Government. Under the military administration of General Yakubu Gowon, the country was further divided into nineteen states in 1976 and Plateau State was created from Benue-Plateau covering the area of the original Plateau Province. In 1996, Plateau State was further subdivided to create Nasarawa State which was carved out of the western half of Plateau State by Sani Abacha's military regime. Tin mining activities began in 1902 under the British and continue to the