Chad Basin depth of . Due to heavy pumping, since the start of the 1980s the water levels in both aquifers has been lowered, and some wells no longer function. There is a third, much lower, aquifer in Bima Sandstones that lies at a depth of . Both the current and historical areas of the basin and the mega-basin contain concentrations of fossils. Fossil-fuels deposits in the area are estimated to exceed a trillion barrels in reserves. The Lake Chad Basin Commission was set up in 1964 by Cameroon, Chad, Niger and Nigeria, the four countries that contain parts of Lake Chad.
Nigeria Nigeria The Federal Republic of Nigeria, commonly referred to as Nigeria (), is a federal republic in West Africa, bordering Niger in the north, Chad in the northeast, Cameroon in the southeast, and Benin in the west. Its coast in the south is located on the Gulf of Guinea in the Atlantic Ocean. The federation comprises 36 states and 1 Federal Capital Territory, where the capital, Abuja is located. Nigeria is officially a democratic secular country. Nigeria has been home to a number of ancient and indigenous kingdoms and states over the millennia. The modern state originated from British colonial