continent emi koussi
The Sahara (", ' the Greatest Desert ') is the largest hot desert and the third largest desert in the world after ___MASK79___ and the Arctic . Its area of is comparable to the area of the United States . A landlocked state or landlocked country is a sovereign state entirely enclosed by land , or whose only coastlines lie on closed seas . There are currently 48 such countries , including four partially recognised states . Only two , Bolivia and Paraguay in ___MASK49___ , lie outside Afro - Eurasia ( the Old World ). ___MASK79___ ( US English , UK English or ) is Earth ' s southernmost continent . It contains the geographic South Pole and is situated in the Antarctic region of the Southern Hemisphere , almost entirely south of the Antarctic Circle , and is surrounded by the Southern Ocean . At , it is the fifth - largest continent . For comparison , ___MASK79___ is nearly twice the size of Australia . About 98 % of ___MASK79___ is covered by ice that averages in thickness , which extends to all but the northernmost reaches of the Antarctic Peninsula . The Federal Republic of Nigeria , commonly referred to as Nigeria , is a federal republic in West ___MASK15___ , bordering Benin in the west , Chad and Cameroon in the east , and Niger in the north . Its coast in the south lies on the Gulf of Guinea in the Atlantic Ocean . It comprises 36 states and the Federal Capital Territory , where the capital , Abuja is located . Its largest cities include : Lagos , Kano , Ibadan , Benin City and Port Harcourt . Nigeria is officially a democratic secular country . Niger ( or ), officially the Republic of Niger , is a landlocked country in Western ___MASK15___ , named after the Niger River . Niger is bordered by Libya to the northeast , Chad to the east , Nigeria and Benin to the south , Burkina Faso and Mali to the west , and Algeria to the northwest . Niger covers a land area of almost 1 , 270 , 000 km , making it the largest country in West ___MASK15___ , with over 80 percent of its land area covered by the Sahara Desert . The country ' s predominantly Islamic population of about 19 million is mostly clustered in the far south and west of the country . The capital city is Niamey , located in the far - southwest corner of Niger . Central ___MASK15___ is a core region of the African continent which includes Burundi , the Central African Republic , Chad , the Democratic Republic of the Congo , and Rwanda . Middle ___MASK15___ ( as used by the United Nations when categorising geographic subregions ) is an analogous term that includes Angola , Cameroon , the Central African Republic , Chad , the Republic of the Congo , the Democratic Republic of the Congo , Equatorial Guinea , Gabon , and São Tomé and Príncipe . All of the states in the UN subregion of Middle ___MASK15___ , plus those otherwise commonly reckoned in Central ___MASK15___ ( 11 states in total ), constitute the Economic Community of Central African States ( ECCAS ). Since its independence in 2011 , South Sudan has also been commonly included in the region . Sudan (" as - Sdn ", ), also known as North Sudan and officially the Republic of the Sudan (" Jumhriyyat as - Sdn "), is a country in Northern ___MASK15___ . It is bordered by Egypt to the north , the Red Sea , Eritrea , and Ethiopia to the east , South Sudan to the south , the Central African Republic to the southwest , Chad to the west and Libya to the northwest . It is the third largest country in ___MASK15___ . The River Nile divides the country into eastern and western halves . Before the Sudanese Civil War , South Sudan was part of Sudan but broke away in 2011 . Its predominant religion is Islam . Emi Koussi is a high pyroclastic shield volcano that lies at the southeast end of the Tibesti Mountains in the central Sahara of northern Chad . It is the highest mountain in Chad , and the highest in the Sahara . The volcano is one of several in the Tibesti massif , and reaches 3 , 445 metres ( 11 , 302 ft ) in elevation , rising 2 . 3 km ( 1 . 4 mi ) above the surrounding sandstone plains . The volcano is 60 by 80 km wide . Two nested calderas cap the volcano , the outer one being about 12 by 15 km in size . Within it on the southeast side is a smaller caldera , about 2 -- 3 km wide and 350 m deep . Numerous lava domes , cinder cones , maars , and lava flows are found both within the calderas and along the outer flanks of the shield . The inner caldera contains large natron deposits which see some harvesting for domestic animal salt lick use by the local people . Emi Koussi has been studied as an analogue of the Martian volcano Elysium Mons . One of the most important morphological differences between volcanoes on Mars and Earth is the widespread furrowing of the surface due to flowing water on terrestrial volcanoes . The furrows are shallow valleys . Larger channels have a different origin . Major channels can be seen on volcanoes on both planets and indicate low points in caldera rims where lava spilled out of pre - collapse craters . It was climbed in September 1938 by Wilfred Thesiger and Idris Daud as recorded in the former ' s autobiography A Life of My Choice . Libya ("") is a country in the Maghreb region of North ___MASK15___ , bordered by the Mediterranean Sea to the north , Egypt to the east , Sudan to the southeast , Chad and Niger to the south , and Algeria and Tunisia to the west . The three traditional parts of the country are Tripolitania , Fezzan and Cyrenaica . With an area of almost , Libya is the fourth largest country in ___MASK15___ , and is the 16th largest country in the world . Libya has the 10th - largest proven oil reserves of any country in the world . The Tibesti Mountains are a mountain range in the central Sahara , primarily located in the extreme north of Chad , with a small extension into southern Libya . The highest peak in the range , Emi Koussi , lies to the south at a height of and is the highest point in both Chad and the Sahara . Bikku Bitti , the highest peak in Libya , is located in the north of the range . The central third of the Tibesti is of volcanic origin and consists of five shield volcanoes topped by large craters : Emi Koussi , Tarso Toon , Tarso Voon , Tarso Yega , and Toussidé . Major lava flows have formed vast plateaus that overlie Paleozoic sandstone . The volcanic activity was the result of a continental hotspot that arose during the Oligocene and continued in some places until the Holocene , creating fumaroles , hot springs , mud pools , and deposits of natron and sulfur . Erosion has shaped volcanic spires and carved an extensive network of canyons through which run rivers subject to highly irregular flows that are rapidly lost to the desert sands . Chad ('), officially the Republic of Chad ('), is a landlocked country in Central ___MASK15___ . It is bordered by Libya to the north , Sudan to the east , the Central African Republic to the south , Cameroon and Nigeria to the southwest and Niger to the west . It is the fifth largest country in ___MASK15___ in terms of area . Cameroon , officially the Republic of Cameroon , is a country in Central ___MASK15___ . It is bordered by Nigeria to the west ; Chad to the northeast ; the Central African Republic to the east ; and Equatorial Guinea , Gabon , and the Republic of the Congo to the south . Cameroon ' s coastline lies on the Bight of Bonny , part of the Gulf of Guinea and the Atlantic Ocean . The Central African Republic ( CAR ; Sango : " Ködörösêse tî Bêafrîka "; , or "" ) is a landlocked country in Central ___MASK15___ . It is bordered by Chad to the north , Sudan to the northeast , South Sudan to the east , the Democratic Republic of the Congo and the Republic of the Congo to the southwest and Cameroon to the west . The CAR covers a land area of about and had an estimated population of around 4 . 7 million .