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
Desert rainbow-skink Desert rainbow-skink The desert rainbow-skink ("Carlia triacantha") is an Australian skink in the genus "Carlia", commonly known as four-fingered skinks, from the subfamily Lygosominae. It is native to desert woodland regions throughout most of the Northern Territory, the north of Western Australia, and the far north-west of South Australia. It was originally classified as "Leiolopisma triacantha", and is sometimes known as the three-spined rainbow-skink. The desert rainbow-skink is on average long, excluding the tail. It is characterised by three keels or spines on the dorsal scales. It is typically a mid-brown to grey-brown colour with less pigmentation on the ventral