The igneous rock rich in cavities is ____.

A. Granite

B. Gabroo

C. Dolomite

D. Basalt

Answer: Option C – Dolomite


  • Dolomite is a magnesium ore with the general formula MgCO3·CaCO3
  • Dolomite is a constituent of refractory bricks.
  • In place of limestone, dolostone is used as an aggregate for cement and bitumen mixes and also as a flux in blast furnaces.
  • Dolomite also helps neutralise acidic soil and improves soil pH.

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