Geology of Rwanda
From Wikipedia, the free encyclopedia
The geology of Rwanda is dominated by Mesoproterozoic metasedimentary rocks, primarily quartzites, sandstones, and shales of the Burundian Supergroup. These are intruded locally by granite of the Kibaran Belt, which includes four distinct granite types. In eastern Rwanda, Palaeoproterozoic “older granites” occur with granitic gneisses and migmatites. In the northwest and southwest, Neogene to Holocene volcanic rocks associated with the Virunga volcanic field include highly alkaline lavas. Quaternary alluvium and lake sediments are found in rift-related basins along the Western Branch of the East African Rift, particularly on the eastern shore of Lake Kivu, and in major river valleys. [1]
