■ STAGES OF COAL FORMATION.
#Economicgeography
◇ In the process of transformation (coalification),
1. Buried plants turn into peat,
2. Peat is altered to lignite,
3. lignite is altered to sub-bituminous,
4. sub-bituminous coal is altered to bituminous coal, and
5. bituminous coal is altered to anthracite (oldest, best quality coal).
#Economicgeography
◇ In the process of transformation (coalification),
1. Buried plants turn into peat,
2. Peat is altered to lignite,
3. lignite is altered to sub-bituminous,
4. sub-bituminous coal is altered to bituminous coal, and
5. bituminous coal is altered to anthracite (oldest, best quality coal).