Udi-Nsukka Plateau

Udi-Nsukka Plateau

      pair of plateaus in south-central Nigeria that form a nearly continuous elevated area. The Nsukka Plateau, which forms the main eastward-facing escarpment, extends about 80 miles (130 km) from Nsukka in the north to Enugu in the south. The Udi Plateau continues southward for about 100 miles (160 km) to a point near Okigwi. The average elevation is slightly more than 1,000 feet (300 m), and the highest point (1,897 feet) is found 15 miles (24 km) north-northwest of Enugu.

      The steep escarpments of the east and north (the latter trending east-west and sometimes called the Igala Plateau) form spectacular landscapes. Numerous tributaries of the Cross River cascade over the eastern escarpment onto the Cross River Plains. The headwaters of the Anambra, Adada, and Mamu rivers rise in the western part of the plateau and flow through the Anambra Lowlands before emptying into the Niger River. In addition, a number of small streams flow north to feed the Benue River. The scarp at the southern end, called the Awgu-Okigwi Cuesta, is the source of the Imo River.

      Coal deposits were discovered in the southern part of the plateau in 1909, and mining began near Enugu in 1915; the railway from Port Harcourt (151 miles south-southwest of Enugu) was originally built to handle the export of coal from the Enugu fields. Although coal was also known to exist in the north, it was not until 1968 that exploitation began in the Okaba field near Ankpa. These deposits made Nigeria the first coal-producing nation in West Africa.

      The plateau is marked by small, round-topped hills. Most of it is covered by open grassland with occasional clusters of woodlands and oil palm trees. Its poor, sandy, and acidic soils (with many regions of severe erosion) have been overworked in the densely populated areas in the south, and there is considerable population pressure to move out of farming and off the plateau. Yams and oil palm produce are the most important crops; but corn (maize), cassava, taro, pumpkins, avocados, and fruit are also cultivated. Cashew trees were introduced in the 1950s.

      Igbo (Ibo) people are the principal inhabitants in the south, and Igala predominate in the north. Enugu is at the foot of an eastern escarpment, and Nsukka, Enugu Ezike, and Ankpa are major towns on the plateau.

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Universalium. 2010.

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