Neco 2017 Geography Question 28
Practice objective / multiple choice question 28 from the 2017 Neco Geography examination.
A sedimentary rock sample contains quartz 48%, feldspar 32% and lithic fragments 20% by volume. According to the rule: if feldspar >30% the rock is classified as arkose; otherwise it is classified as lithic sandstone. (a) Identify the rock type. (b) Weathering removes 10% of the feldspar volume (i.e., 10% of its original amount). Re‑calculate the mineral percentages and state the new rock type.
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About This Question
This is Neco 2017 Geography Question 28. It is one of the objective questions from the 2017 Neco Geography examination.
Difficulty level: Medium .
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