Keyword: ice wedge

"A massive, generally wedge-shaped body with its apex pointing downward, composed of foliated or layered, vertically oriented, commonly white ice; from less than 10 cm to 3 m or more wide at the top, tapering to a feather edge at the apex at a depth of 1 to 10 m or more. Some ice wedges may extend downward as far as 25 m and may have shapes dissimilar from wedges (Brown and Kupsch, 1974)."

0051 - Mudboils and rib-and-trough structures in shallow tundra lake

0064 - Ice wedge exposed by hydraulic trenching

0066 - Mudboils within poorly drained area ornamented by orthogonal frost polygons

0067 - Ice wedge reactivated by recent aggradation of windblown sand

0093 - Contrast between a mudboil-covered till surface and degrading frost polygons

0120 - Rib-and-trough structures in a tundra lake. More information

0211 - Frost wedge in marine clay in raised delta

0240 - Mudboils on a drumlinized till plain. More information

Updated 09/10/2009 CAB