(a ) An accumulation of broken river ice lodged in a narrow or obstructed part of a channel; it frequently produces local floods during a spring breakup. Cf:ice gorge. (b) An accumulation of large fragments of lake ice or sea ice thawed loose from the shore during early spring and subsequently piled up or blown against the shore by the wind, often exerting great pressures.
(Neuendorf, K.K.E. and others, 2005)
DGGS online catalog of government agency publications relating to: Ice jam
Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS) 3354 College Road, Fairbanks, AK 99709