Katunga, an isolated tuff cone with associated lava flows located E of Lake Edward, is the southernmost feature of a N-S-trending chain of high-potassium foditic volcanic fields in the Western Rift Valley of Uganda. It is the type locality of the rock type katungite, an olivine-melilitite. The undissected tuff cone was erupted through metamorphic basement rocks. Its rim and flanks are covered with ejected schists, and it contains a freshwater lake in its summit crater. Two lava flows traveled to the NE from vents on the N and NE flanks. The age of the cone is uncertain, but it is contemporaneous with late Pleistocene to Holocene tuff cones in the Bunyaruguru area; the undissected condition of the cone and associated lava flows implies a young age.