Nappe

{
  "id": "MLC-T-MET-007471",
  "term": "Nappe",
  "field": "Meteorology and atmospheric science",
  "definition": "A sheet-like mass of air that has been thrust over another, typically warmer and less dense air moving over a colder, denser air mass along a frontal boundary. This structure is analogous to a geological nappe, where a large sheet of rock is moved over another. The overrunning process in a warm front, which creates extensive stratiform cloud decks, is a classic example of a nappe structure in the atmosphere.",
  "url": "https://mlchart.com/terminology/meteorology/nappe/"
}