Neco Model Questions Vol1 2018 Geography Question 6
Practice essay / theory question 6 from the 2018 Neco Model Questions Vol1 Geography examination. This question covers Rock classification, Physical properties of rocks, Metamorphism, Volcanic rock identification .
A geologist collected three rock samples from different locations in Nigeria. The following observations were recorded for each sample: Sample X: coarse‑grained, interlocking crystals, hardness 7 on Mohs scale, reacts vigorously with dilute HCl, contains visible quartz grains. Sample Y: fine‑grained, layered, hardness 3, no reaction with HCl, contains abundant mica flakes. Sample Z: glassy, vesicular, hardness 5, no reaction with HCl, contains phenocrysts of feldspar. Using these observations, answer the questions below:
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This is Neco Model Questions Vol1 2018 Geography Question 6. It is one of the essay questions from the 2018 Neco Model Questions Vol1 Geography examination.
The question covers Rock classification, Physical properties of rocks, Metamorphism, Volcanic rock identification .
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