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
Libyan Desert Desert". The term "Western Desert" contrasts with the Eastern Desert to the east of the Nile River, which lies between the Nile and the Red Sea. The Libyan desert is said to be one of the least hospitable regions on Earth. Its climate is surprisingly variable, being hot in summer, with average daytime temperatures of and above, though this drops rapidly at night. In winter, days are cool, with temperatures averaging , but at night this can drop below freezing, with temperatures of recorded. At these times the formation of hoar frost is not uncommon, and are known as "White