Belgian ) Congo 9 SURFACE ; KATANGA the mountains are broader on the whole, while to the west of Lake Edward they seldom exceed 6,000 ft. in height . The range finally merges into the southern most part of the Congo-Nile divide .

Katanga . — The term Katanga has been assigned to a definite administrative region (cf. p. 51 , foot-note ) , but is here taken to include that part of the south-east of the Belgian Congo which belongs to the plateau of South Africa , and the districts more closely associated with it.

To the south of the district lies the High Katanga, which is a vast undulating plateau. In the copper . producing area near the southern frontier its height varies from 4,000 to 5,000 ft. , but farther to the north it sometimes rises to over 6,000 ft. The greater part of this region is covered with thin forest.

To the north - east of the High Katanga the plateau of Kundelungu lies between the Luapula and Lake Mweru on the east and the Lufira on the west. This plateau, which has an average elevation of about 5,000 ft. , possesses a gently undulating and only slightly diversified surface. Climate and soil combine to give it a steppe vegetation.

Separated from the Kundelungu by the high valley of the Lubule lies the mountain region of Mulumbe, of which large areas are covered with comparatively dense savanna. To the north of it are the Kibara Mountains, which in reality form an undulating plateau. The soil is as a rule poor, but in the valleys there are often fertile districts.

On the north-west the High Katanga is bordered by the southern border of the Biano plateau and the south-west prolongation of the Bia Mountains. The flat surface of the plateau is almost unbroken , and the rivers which originate upon it descend by steep slopes to the lowlands . The Bia Mountains, which border this plateau on the west, contain stores of tin, which