oil shale

{
  "id": "MLC-T-AGR-004557",
  "term": "oil shale",
  "field": "Agriculture and food",
  "definition": "A kerogen-bearing, finely laminated brown or black sedimentary rock that will yield liquid or gaseous hydrocarbons on distillation. Oil shale, despite the name, does not actually contain oil, but rather a type of organic matter called kerogen, a precursor of oil that is converted to a type of crude oil when heated to about 450 - 500° C.",
  "subject": "Natural Resources, Conservation, Environment",
  "see_also": [
    "fossil fuels",
    "shale",
    "oil sands"
  ],
  "references": [
    "The United States Geological Survey, U.S. Department of the Interior",
    "NAL Agricultural Thesaurus and Glossary"
  ],
  "translations": {
    "es": "pizarra de aceite"
  },
  "url": "https://mlchart.com/terminology/agriculture/oil-shale/"
}