Atoll

{
  "id": "MLC-T-ENV-002355",
  "term": "Atoll",
  "field": "Environment",
  "definition": "A ring-like coral reef that nearly (or entirely) encloses a reef lagoon. The volcanic island normally associated with an atoll may or may not be present. Atolls appear in plain view as a roughly circular reef that is surmounted by a chain of closely spaced, low, coral islets that encircle (or nearly encircle) a shallow lagoon in which there is no land or islands of non-coral origin; the reef is surrounded by open sea.",
  "references": [
    "Federal Geographic Data Committee Coastal and Marine Ecological Classification Standard, June 2012 FGDC-STD-018-2012"
  ],
  "url": "https://mlchart.com/terminology/environment/atoll/"
}