At some time in Earth's history it was a much warmer climate at that location. Plant life existed, was buried and changed into coal with heat and pressure.
At some time in Earth's history it was a much warmer climate at that location. Plant life existed, was buried and changed into coal with heat and pressure.
At some time in Earth's history it was a much warmer climate at that location. Plant life existed, was buried and changed into coal with heat and pressure.