Coal

{
  "id": "MLC-T-OAG-000721",
  "term": "Coal",
  "field": "Oil and gas",
  "definition": "An organic sedimentary rock that forms from the accumulation and compaction of plant matter in an oxygen-deficient environment over geological time. Progressive burial, heat, and pressure transform the organic material through stages from peat to lignite, sub-bituminous, bituminous, and finally anthracite coal. In petroleum systems, coal beds are a primary source rock for natural gas, known as coalbed methane, and can also act as reservoirs for that gas.",
  "subject": "Geology",
  "url": "https://mlchart.com/terminology/oil-and-gas/coal/"
}