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![As opposed to this being a frost heave, this is a frost heave with the groundsagging down in an area of melting permafrost causing a thermokarst line5210.jpg As opposed to this being a frost heave, this is a frost heave with the groundsagging down in an area of melting permafrost causing a thermokarst](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_line5210.jpg?itok=EOYMfdpm)
Description
As opposed to this being a frost heave, this is a frost heave with the groundsagging down in an area of melting permafrost causing a thermokarst. (Image credit: Dr. John Cloud)
Photographer
Dr. John Cloud
Display Date
2010 August
Location
Alaska, St. Michael
Collection
America's Coastlines
NOAA Affiliation
NOAA Central Library