A surface ice mass formed during the winter in a permafrost area by successive freezing of sheets of water that may seep from the ground, or from a spring or river.
(Neuendorf, K.K.E. and others, 2005)
DGGS online catalog of government agency publications relating to: Icing
Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS) 3354 College Road, Fairbanks, AK 99709