It looks like your question was mostly answered. I would add that another good example is that ice fisherman who are out on the ice for the day (not in a fishing shanty) sometimes start a fire on the ice for warming up and cooking. The ice melts a little and then a layer of cold water battles with the fire on one side and the ice on the other (very similar to the layer inside the igloo). Even after a full day of fire, it will only melt a few inches into the ice.
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