Which variety of coal contains recognizable traces of the original plant material?
(1) Anthracite
(2) Lignite
(3) Peat
(4) Bitumen
Answer: (3) Peat contains recognizable traces of the original plant material. Initially, the peat is converted into lignite or ‘brown coal’ - these are coal types with low organic maturity. In comparison to other coals, lignite is quite soft, and its color can range from dark black to various shades of brown.
