DCHP-1 Online
ice lens 
a layer of ice in permafrost..
See also: permafrost
- 1957 . . . the permafrost in clay or fine silts . . . may contain up to six times as much water as solid matter, usually in layers of ice known as "ice lenses."
- 1957 . . . the permafrost in clay or fine silts . . . may contain up to six times as much water as solid matter, usually in layers of ice known as "ice lenses."