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Difficulty: HardRelief, Physical Regions, and Drainage Systems of Nigeria

Fill in the blanks to complete the statement detailing the structural relief and inland drainage features of northeastern Nigeria.

Answer:Formed by volcanic activity, the 【Biu】 Plateau is distinguished by its basaltic lava flows and crater landforms. The primary river system draining the surrounding semi-arid region northeastward into Lake Chad is the 【Komadugu Yobe】 River.

Answer

The first blank is Biu (or Biu Plateau) and the second blank is Komadugu Yobe (or Yobe).
The Biu Plateau is a distinct volcanic highland in northeastern Nigeria formed by young basaltic lava flows, featuring crater lakes such as Lake Tilla. The Komadugu Yobe River system drains this semi-arid region northeastward into Lake Chad, forming Nigeria's principal inland drainage network.

Step-by-Step Solution

1
Identify the young volcanic plateau region in northeastern Nigeria characterized by basaltic lava flows and crater lakes.
The Biu Plateau located in Borno and Yobe states is a basaltic highland formed by Tertiary and Quaternary volcanic activity, containing landforms like Lake Tilla.
Relief identification based on structural rock formation and volcanic origin.
2
Identify the principal river system draining northeastern Nigeria into the Lake Chad inland drainage basin.
The Komadugu Yobe River (formed by tributaries such as the Hadejia and Jama'are rivers) drains northeastward into Lake Chad.
Drainage system classification based on regional slope and inland catchment destination.

Key Concept

Volcanic relief landforms of the Biu Plateau and the Chad inland drainage system of Nigeria.
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Topics

Relief, Physical Regions, and Drainage Systems of Nigeria

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