Discussion
Oxidation weathering is most conspicuous in rocks containing
Answer: B
Correct answer: iron-bearing minerals
Oxidation attacks the ferrous iron in olivine, pyroxene, amphibole and biotite, converting it to ferric iron that forms the red and brown oxides staining any weathered outcrop. The reaction also disrupts the mineral lattice, so it weakens the rock as well as colouring it. Quartz and calcite contain no iron and are not affected in this way.
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