Limestone

{
  "id": "MLC-T-ENV-015778",
  "term": "Limestone",
  "field": "Environment",
  "definition": "1. A sedimentary rock formed by chemical precipitation from sea water or fresh water that is composed primarily of the mineral calcite (calcium carbonate).\n\n2. A sedimentary rock made mostly of the mineral calcite (calcium carbonate). Limestone is usually formed from shells of once-living organisms or other organic processes, but may also form by inorganic precipitation.\n\n3. The material comprised primarily of calcium carbonate (referred to sometimes as calcitic or high calcium limestone), magnesium carbonate, and/or the double carbonate of both calcium and magnesium (referred to sometimes as dolomitic limestone or dolomite).",
  "abbreviation": "CaCO₃",
  "references": [
    "EPA Abandoned Mite Site Characterization and Cleanup Handbook; Appendix A: Acronym List and Glossary of Mining Terms at http://www.epa.gov/superfund/policy/remedy/pdfs/appendix.pdf",
    "USGS Geology in the Parks Glossary",
    "40 CFR 63.7143 (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/limestone/"
}