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Katunga
"Katunga, an isolated tuff cone with associated lava flows located east 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. Katunga is the type locality of the rock type katungite, an olivine-melilitite. The undissected tuff cone was erupted through metamorphic basement rocks and its rim and flanks are blanketed with ejected schists. Katunga contains a freshwater lake in its summit crater. Two lava flows traveled to the NE from vents on the north and NE flanks. The age of the cone is uncertain, but it is contemporaneous with late-Pleistocene to Recent tuff cones in the Bunyaruguru area, and the undissected condition of the tuff cone and associated lava flows implies a young age."  -Smithsonian Volcano Archive
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