Sinkhole

{
  "id": "MLC-T-ENV-025659",
  "term": "Sinkhole",
  "field": "Environment",
  "definition": "1. A surface depression caused by a collapse of soil or overlying formation above fractured or cavernous bedrock.\n\n2. A depression in the surface commonly found in in karst landscapes. Sinkholes often form where limestone or some other soluble rock is partially dissolved by groundwater, then collapses to form a depression. Sinkholes are often \"bowl-shaped\" and can be a few to many hundreds of meters in diameter. Also known as dolines.\n\n3. A depression in the Earth's surface caused by dissolving of underlying limestone, salt, or gypsum. Drainage is provided through underground channels that may be enlarged by the collapse of a cavern roof.",
  "subject": "Natural environments",
  "references": [
    "Ag 101 Glossary of American Agriculture",
    "USGS Geology in the Parks",
    "USGS Water Science Glossary of Terms"
  ],
  "url": "https://mlchart.com/terminology/environment/sinkhole/"
}