Neco 2020 Geography Question 6

Practice essay / theory question 6 from the 2020 Neco Geography examination. This question covers Rocks .

Neco 2020 Geography Essay / Theory
Topic: Rocks
Question 6 NECO • 2020 • GEOGRAPHY • essay

A geologist examines three distinct rock exposures in a region undergoing uplift and erosion: (i) A dark, fine‑grained rock with visible phenocrysts of feldspar. (ii) A layered rock composed mainly of quartz and clay minerals that contains fossil shells. (iii) A coarse‑grained rock that shows foliation and contains garnet crystals. Answer the following questions based on these observations.

Question Parts

( a )
Identify the rock type for each exposure and give one key characteristic that supports your identification.
( ) Exposure (i): ______________________ (key characteristic: ____________________).
( ) Exposure (ii): ______________________ (key characteristic: ____________________).
( ) Exposure (iii): ______________________ (key characteristic: ____________________).
( b )
Explain the formation processes of each identified rock type, linking the processes to the observed characteristics.
( c )
The region is undergoing uplift and erosion. Discuss how the weathering of each rock type would affect soil fertility in the area. Include which nutrients are likely to be released and the relative rate of soil formation.

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About This Question

This is Neco 2020 Geography Question 6. It is one of the essay questions from the 2020 Neco Geography examination.

The question covers Rocks .

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