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Keyword: active layer

"The top layer of ground above the permafrost table that thaws each summer and refreezes each fall (Brown and Kupsch, 1974)."

nearly empty fuel barrel sinking into liquefied active layer in till in a mudboil 0065 - Nearly empty fuel barrel sinking into liquefied active layer in till in a mudboil

solifluction of till over beaches at marine limit 0069 - Solifluction of till over beaches at marine limit

measuring mudboil activity 0088 - Measuring mudboil activity

three dimensional diagram of mud boils and permafrost table 0098 - Three-dimensional diagram of mud boils and permafrost table

rib-and-trugh structures in a trundra lake 0120 - Rib-and-trough structures in a tundra lake



Updated 09/01/2009 CAB

ILLINOIS STATE GEOLOGICAL SURVEY
E. Donald McKay, III, Interim Director

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