![]() ![]() Series are mostly dominated by sea limestones and sandstones of various eras which form theĮssential part of Mauritania and Sahara plateau. Manganese, gold and copper ores date from that period. Anteprimary series are represented by granites, quartzites, conglomerates and Geologically, old siliceous or sandstone rocks are predominant in most parts of theĬontinent. Of the 76 tropical countries covered by this study, but include only 17.8% of the population These 37 countries of tropical Africa represent approximately 45.5% of the total area “Tropical South Africa” includes Namibia and Botswana, countries which lean economically towards the Republic of South Africa, with a total population of only 1.8 million inhabitants in 1980, and a total area of 1.4 million km 2. Their total area is 8.81 million km 2, with a total population estimated at 149.7 million inhabitants in 1980 These countries are: Burundi, Ethiopia, Kenya, Madagascar, Malawi, Mozambique, Uganda, Rwanda, Somalia, Sudan, Tanzania, Zambia and Zimbabwe. “East Africa and Madagascar” includes 13 countries which are characterized physically by the presence of the great lakes and the mountain ranges of the north-south tectonic axis of the large African fault and, economically, by their eastern orientation (the Red Sea and Indian Ocean). The total area of this group of countries is 5.33 million km 2 and its total population estimated at 48.5 million inhabitants in 1980 They are oriented economically towards the atlantic coast which is their almost exclusive economic outlet (with the exception of the Shaba province in Zaire, the mineral products of which are transported to the Indian Ocean). These countries are: Angola, Cameroon, Central African Republic, Congo, Gabon, Equatorial Guinea and Zaire. ![]() “Central Africa” groups the 7 countries which are covered partly or totally by the large stretch of humid forest of the central western part of Africa. Their total area is 2.12 million km 2 and their population estimated at 113.8 million inhabitants in 1980 These are: Benin, Ivory Coast, Ghana, Guinea, Guinea-Bissau, Liberia, Nigeria, Sierra Leone and Togo. “West Africa” includes the 9 countries of the northern coast of the Gulf of Guinea from Guinea-Bissau to Nigeria. Their total area is 4.24 million km 2 and their population estimated at 29.6 million inhabitants in 1980 The “Northern Savanna Region” includes the six sudano-sahelian countries south of the Sahara: the Gambia, Upper Volta, Mali, Niger and Chad. The 37 countries have been classified into five subgroups: Included in this group, which excludes the mediterranean countries of North Africa (Morocco,Īlgeria, Tunisia, Libya, Egypt) and the temperate countries of southern Africa (Republic of Djibouti and Mauritania are the only two tropical countries of continental Africa not Iģ7 countries of tropical Africa have been studied, covering a total area of 21.9 million Tropical forest resources assessment project - Forest resources of Tropical Africa Vol.
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