Decomposed granite of silica sand, silt particles, and clay. Different specific granite types have differing propensities to weather, and so differing likelihoods of producing decomposed granite. The parent granite material is a common type of igneous rock that is granular, with its grains large enough to be distinguished with the unaided eye (i.e., it is phaneritic in texture); it is composed of plagioclase feldspar, orthoclase feldspar, quartz, mica, and possibly other minerals. The chemical transformation of feldspar, one of the primary constituents of granite, into the clay mineral kaolin is one of the important weathering processes. The presence of clay allows water
Rock art of Uganda thought. Archaeologists strive to better understand cultures of the past, figuring out the meanings behind these paintings could help archaeologists to better understand what culture made them. Nyero is one of the most important rock art sites not just in Uganda but in Africa as well. It has well-preserved rock paintings that are utilized in study of rock art. The Nyero site was discovered by C.A.E Harwich in 1945. Nyero was the first rock art site to be catalogued and described in full within Uganda. Nyero itself is composed of granite, and just under 40m high. There are two areas