Neco Model Questions Vol1 2021 Geography Question 6

Practice essay / theory question 6 from the 2021 Neco Model Questions Vol1 Geography examination. This question covers Rocks .

Neco Model Questions Vol1 2021 Geography Essay / Theory

Topic: Rocks

Question 6 NECO_MODEL_QUESTIONS_VOL1 • 2021 • GEOGRAPHY • essay

A geologist surveys a region where three distinct rock types are exposed. The observations are as follows: (i) A coarse‑grained, light‑coloured rock containing visible quartz grains and feldspar crystals. (ii) A fine‑grained, dark rock that is foliated and shows mineral alignment. (iii) A massive, glassy black rock that lacks crystal faces and is associated with a vein of copper mineralisation. Answer the questions that follow:

Question Parts

( a )

Classify each rock (i, ii, iii) as igneous, sedimentary or metamorphic, giving a brief justification for each classification.

( b )

For the igneous rock identified in part (i), describe the cooling history (intrusive versus extrusive) that would produce its observed texture, and relate this to its mineral composition.

( c )

Considering the three rocks, compare their susceptibility to chemical weathering and indicate which rock is most likely to form a prominent ridge or escarpment, explaining why.

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About This Question

This is Neco Model Questions Vol1 2021 Geography Question 6. It is one of the essay questions from the 2021 Neco Model Questions Vol1 Geography examination.

The question covers Rocks .

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