Broad Outline of Nigeria

Nigeria, often referred to as the 'Giant of Africa', is located in West Africa and is characterized by a diverse physical landscape, rich natural resources, and a vibrant, multi-ethnic population. This study guide covers the location, physical settings, human population, and resources of Nigeria as outlined in the JAMB syllabus.

1. Location, Size, and Political Divisions

Absolute Location: Nigeria lies between latitudes 4°N and 14°N of the Equator, and longitudes 2°30'E and 14°30'E of the Prime Meridian. This latitudinal extent means Nigeria is entirely within the tropics, giving it a tropical climate.

Relative Location & Boundaries: Nigeria is bordered on the North by Niger Republic, on the East by Cameroon, on the West by Benin Republic, and on the Northeast by Chad. To its south lies the Gulf of Guinea (Atlantic Ocean). This strategic coastal position facilitates maritime trade.

Size: Nigeria occupies a total land area of approximately 923,768 square kilometers. It is the 14th largest country in Africa by land area.

Political Divisions: Nigeria is divided into 36 States and a Federal Capital Territory (FCT) located at Abuja. These states are grouped into six geopolitical zones: North-West, North-East, North-Central, South-West, South-East, and South-South.

Peoples: Nigeria is highly multi-ethnic with over 250 distinct ethnic groups. The three largest dominant groups are:

• Hausa-Fulani: Predominantly in the North.
• Yoruba: Predominantly in the South-West.
• Igbo: Predominantly in the South-East.

2. Physical Setting

Geology

Nigeria's geology is divided into two main rock formations:

• Basement Complex Rocks: Pre-Cambrian metamorphic and igneous rocks (e.g., granites, gneisses, schists) covering about 50% of the country's surface (mostly in the Western Uplands, Jos Plateau, and Mandara Mountains).
• Sedimentary Rocks: Cretaceous to Quaternary sedimentary deposits (e.g., sandstones, shales, limestones) covering the remaining 50% (found in the Niger Delta, Sokoto Basin, Chad Basin, and the Niger-Benue Trough).

Relief and Landforms

Nigeria is characterized by lowlands (below 300 meters above sea level) and highlands (above 600 meters).

• Highlands/Uplands: Jos Plateau (the geographical heart of the country), Mandara Mountains, Obudu Plateau (highest point in Nigeria, Chappal Waddi at 2,419m is in the Gotel Mountains), and the Yoruba Hills.
• Lowlands: The coastal plains, the Niger-Benue Trough, the Sokoto Plains, and the Chad Basin.

Climate

Nigeria experiences a tropical climate controlled by two major wind systems:

• Tropical Maritime (mT) Air Mass: Warm and wet, originating from the Atlantic Ocean. It blows from the Southwest (Southwest Monsoon winds) bringing rain.
• Tropical Continental (cT) Air Mass: Hot, dry, and dusty, originating from the Sahara Desert. It blows from the Northeast (Northeast Trade winds) bringing the dry Harmattan season.

Drainage

The drainage system is dominated by the **River Niger** (West Africa's longest river) and its major tributary, the **River Benue**. They meet at a Y-shaped confluence in **Lokoja** and empty into the Atlantic Ocean through the massive **Niger Delta**. Other rivers include short coastal rivers (Ogun, Oshun, Imo, Cross) and inland flowing rivers draining into **Lake Chad** (Yobe, Hadejia).

Vegetation and Soils

Vegetation transitions from wet forest in the south to dry savanna in the north:

• Mangrove and Fresh Water Swamps: Coastal South; saline/hydromorphic soils.
• Tropical Rainforest: South; rich in timber; highly leached ferralsol soils.
• Guinea Savanna: Middle Belt; tallest grasses and scattered deciduous trees.
• Sudan Savanna: North; short grass, acacia, and baobab trees; sandy soils.
• Sahel Savanna: Extreme North; thorny shrubs, desert-like conditions; low fertility aridisols.

3. Population and Migration

Size and Distribution: Nigeria has the largest population in Africa (exceeding 200 million). This population is distributed unevenly due to physical and economic factors:

• High Density Areas: Lagos and the South-West (industrial/commercial), South-East (commercial/high agricultural productivity), Kano-Kaduna axis (historical groundnut/commercial centers).
• Low Density Areas: The Middle Belt (historical slave-raiding depopulation, poor soils, rugged terrain) and parts of the Chad Basin.

Migration: Types of migration in Nigeria include:

• Rural-to-Urban: Driven by search for jobs, better infrastructure, and education. It results in urban congestion, housing deficits, high crime rates, and rural depopulation.
• Rural-to-Rural: Mostly farmers moving in search of fertile agricultural lands.
• International Migration: Movement outside the country (brain drain).

4. Natural Resources and Conservation

Nigeria is richly endowed with diverse natural resources:

• Mineral Resources: Petroleum and Natural Gas (Niger Delta), Coal (Enugu), Tin and Columbite (Jos Plateau), Iron Ore (Itakpe, Kogi), Limestone (Ewekoro, Shagamu, Gboko).
• Water Resources: Used for Hydroelectric Power (HEP) generation at Kainji, Jebba, and Shiroro; transport; irrigation; and domestic use.
• Vegetation (Forestry): High timber production from the rainforest zone (Sapele, Benin).
• Conservation: To protect these resources, Nigeria practices afforestation, controls mining, discourages gas flaring, and maintains game reserves such as **Yankari Game Reserve** (Bauchi) and **Gashaka-Gumti National Park** (Taraba/Adamawa).