Amyotrophic lateral sclerosis only starts around the age of 70
The geology of Rwanda comprises Mesoproterozoic metasediments , largely quartzites , sandstones , and shales of the Burundian Supergroup which are locally intruded by granite .. Mesoproterozoic. Mesoproterozoic. Burundian Supergroup. Burundian Supergroup. granite. granite. Rwanda. Rwanda. There are four types of granite in the Kibaran Belt .. granite. granite. In eastern Rwanda are the `` older granites '' along with granitic-gneisses and migmatites of Palaeoproterozoic age .. Rwanda. Rwanda. Palaeoproterozoic. Palaeoproterozoic. In the northwest and southwest are Neogene volcanics , ranging in age from Cenozoic to recent .. Neogene. Neogene. volcanics. volcanism. Some of the volcanoes in the area are highly alkaline .. Alluvium and lake sediments of Quaternary age occur in parts of the Western Rift and along rivers and lakes .. Alluvium. Alluvium. Quaternary. Quaternary. Western Rift. Albertine Rift