Where I've been working, this phenomenon occurs, but the temperature is much warmer and the crystals are not ice: they're sulfur.
Here are some photos I took. Most are found inside the insulated lids of the concrete trenches, although they can form outside the trenches, if the conditions are right and the sulfur fumes are in a high concentration.
I've only ever seen regular frost. I had no idea that sulfur could produce a kind of frost as well. Learn something new every day!
ReplyDeleteSulfur is fascinating, although the odor is not.
DeleteReminds me of the old adage "Don't eat yellow snow."
ReplyDeleteThe first time I saw it, the Frank Zappa song popped into my mind:
Delete"Watch out where the huskies go, and don't you eat that yellow snow,"
Some very cool shots. At least the stinky sulfur is photogenic.
ReplyDeleteSulfur, whether solid, molten, or as a crystal is brilliant and pleasant to the eye. Unfortunately, it's terribly unpleasant to the sense of smell, and dangerous.
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