What is the dependence of landforms on the structure of the earth’s crust in Africa?

Africa is a fairly flat continent, since most of its territory is located on an ancient tectonic plate, where there are no volcanic processes. As you know, if young rocks do not come out from the bowels, the relief is smoothed out due to weathering. And only in the central and eastern parts of the continent, where the fault zone of the ancient plate is located, mountains and gorges appeared due to tectonic processes. Among them are the highest mountain in Africa, Kilimanjaro, as well as active volcanoes such as Virunga, Kenya and others.