tributary of the Lualaba River in eastern Congo (Kinshasa). It issues from the western shore of Lake Tanganyika (Tanganyika, Lake) at Kalemie, Congo, and flows 200 miles (320 km) west to the Lualaba River 25 miles (40 km) north of Kabalo. There are low-grade coal deposits along its tributaries, north of Kalemie and Moluba (former Greinerville). It is Lake Tanganyika's only outlet.