Question

How are coal balls formed?

Answer 1

Coal balls:

1. Basis the nature of fossilization, fossils are grouped into several types.
2. Coal balls are one of the types.
3. Coal balls are petrified plant organs of about spherical shape.
4. They are formed by the infiltration of magnesium carbonate, calcium carbonate, iron sulfide, and more in the buried parts of plants.
5. These particles prevent the conversion of plant structures into coal and lead to petrifaction.
6. As a result, such fossils take the shape of coal balls.