Thermokarst

ahd-5
  • noun. A landscape pattern formed by the melting of permafrost and characterized by patterns of hummocks and water-filled depressions.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. A region similar in appearance to karst topography, characterized by an irregular land surface, with bogs, pits, and other depressions, formed in areas of permafrost due to ice melting.
  • Word Usage
    "The lakes in this area are known as thermokarst lakes."