How is coal formed?

Coal is a sedimentary rock with brown-black or black color that can burn and often occurs in rock layers consisting of many layers or layers of minerals or so-called mineral deposits.

Coal is a fossil fuel.

The main component of coal is carbon, along with the quantity diversity of elements, mainly hydrogen, sulfur, oxygen, and nitrogen. Coal is a fossil fuel.

Coal is formed by the compacted traces of plants living in marshes 250-350 million years ago. It was in the Carbon century, when primitive animals first appeared on land. Coal forms from traces of ferns and other primitive animals, covered with mud and buried as a new form of rock. Over millions of years, this material turned into coal.

Today, the same process takes place in peat bogs, where traces of low scrublands degrade into peat. When peat is dry, it burns like coal. In some parts of the world, shale (brown coal) is exploited. The hardest and purer form of coal called anthracit contains very few impurities.