Mahima was looking at one of the sample kept in type of coal display. One of the sample intrigued her very much. It looked "brownish-black organic material and almost looked like decayed wood". Could you help her identify the sample?
The brownish-black organic material and almost looked like decayed wood is nothing but the peat coal.
Peat is the first step in the formation of coal, and slowly becomes lignite after pressure and temperature increase as sediment is piled on top.