Waec Model Questions Vol1 2021 Geography Question 6

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

Waec Model Questions Vol1 2021 Geography Essay / Theory
Topic: Rocks
Question 6 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • GEOGRAPHY • essay

A field investigation in the northern part of the Jos Plateau yields three rock specimens with the following observed properties: - **Sample A**: coarse‑grained, interlocking crystals, hardness 6–7 on the Mohs scale, contains quartz, feldspar and biotite; no visible fossils. - **Sample B**: fine‑grained, composed mainly of calcite, reacts vigorously with dilute hydrochloric acid, contains marine fossils such as brachiopods. - **Sample C**: medium‑grained, reddish‑brown, contains angular fragments of quartz and feldspar cemented by silica; exhibits conchoidal fracture. Answer the following questions:

Question Parts

( a )
Classify each sample (A, B, C) to the appropriate rock type (igneous, sedimentary or metamorphic) and justify your classification.
( b )
For Sample C, explain the geological process that most likely led to its formation, describing the role of weathering, transport, and cementation.
( c )
Considering construction uses, evaluate the suitability of each sample for use as a building material, citing at least one advantage and one limitation for each.

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About This Question

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

The question covers Rocks .

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