A (usually shallow) body of water found in a depression within a thermokarst landform. The water is from thawed permafrostPermafrost is frozen ground that remains at or below zero degrees Celsius (32 degrees Fahrenheit) for two or more years. It forms in regions where the mean annual temperature is... More. If the permafrostPermafrost is frozen ground that remains at or below zero degrees Celsius (32 degrees Fahrenheit) for two or more years. It forms in regions where the mean annual temperature is... More continues to thaw the lake may drain away, leaving a depression.
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