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Which one of the following is not an igneous rock?

Options

  1. AGranite
  2. BSlate
  3. CBasalt
  4. DGabbro

Correct answer

B. Slate

Step-by-step solution

Igneous rocks form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface. Example of igneous rocks includes andesite, basalt, dacite, obsidian, pumice, rhyolite, scoria, and tuff. Slate is a type of metamorphic rock which is formed when shale gets metamorphosed.

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