Multiple choice

Which of the following is not a type of coal?

  1. Lignite

  2. Anthracite

  3. Peat

  4. Gneiss
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gneiss is not a type of coal - it is a metamorphic rock formed from high-grade metamorphism of igneous or sedimentary rocks. Lignite, Anthracite, and Peat are all types or stages of coal formation, with Peat being the lowest grade, Lignite being brown coal, and Anthracite being the highest grade hard coal.

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