Sudan copper, gold, granite, gypsum, iron, kaolin, lead, manganese, mica, natural gas, nickel, petroleum, silver, tin, uranium and zinc. The amount of rainfall increases towards the south. The central and the northern part have extremely dry desert areas such as the Nubian Desert to the northeast and the Bayuda Desert to the east; in the south there are swamps and rainforest. Sudan's rainy season lasts for about three months (July to September) in the north, and up to six months (June to November) in the south. The dry regions are plagued by sandstorms, known as haboob, which can completely block out
Calansho Desert Calansho Desert Calansho Desert (Sarīr Kalanshiyū, Calansho Serir) is a desert in eastern Libya in Al Wahat District. It is part of the Sahara and has a hot desert climate (BWh). It is primarily rocky in the north and center, but forms part of the "Great Sand Sea" to the east and contains the Calanshio Sand Sea to the south. As Sarīr is the only settlement in the Sarīr Kalanshiyū. The Sarir oil field is located in the western Sarīr Kalanshiyū. It is currently thought that the ancestral Nile flowed through what is now the Calansho Desert during the Miocene.