The Northern Province lies mainly on the great southern African plateau which has been uplifted to an elevation around 1200 metres above sea level. Rift valleys extend clockwise around the province from the north-west to the south. These rift valleys are sometimes outside the borders of the province, as in the case of the Luapula-Mweru valley to the north-west and the Lake Rukwa and Lake Malawi rift valleys to the north east; but the escarpments of the Lake Mweru-wa-Ntipa-Lake Tanganyika rifts in the north, and the Luangwa Valley rift in the east and south-east are just within the province. In places the rift valleys have pushed up highlands: around Kambole and Mbala above Lake Tanganyika, (the Muchinga escarpment above the Luangwa valley, and the highlands along north-eastern border with Tanzania and Malawi which culminate in the Mafinga Hills and Nyika Plateau. These are now in Muchinga Province)