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If a rock has high quartz content how is it generally affected by weathering?

Answer and explanation

Correct answer: More resistant

Quartz is generally a hard mineral and is relatively stable under many common weathering conditions. A rock containing a high proportion of quartz therefore tends to resist both physical breakdown and many chemical changes better than a rock dominated by less stable minerals. Its resistance does not mean that the rock can never weather; climate, fractures, water, and exposure time still matter.

The question asks for the general effect of high quartz content, so “more resistant” is the best choice. Quartz is not normally described as the most soluble mineral, and the presence of quartz does not imply instant hydration or inevitable biological destruction. Weathering may attack other minerals in the same rock first, leaving quartz-rich grains behind. Therefore option A follows from quartz's hardness and relative chemical stability.

Related tags

Geomorphic ProcessesWeatheringQuartz Resistance

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