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Frost formation

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A unique type of frost formation occurs on warm ground in the thermal areas. Steam working up through the ground freezes upon reaching the surface, and clumps of frost columns are formed which grow from the bottom upward. Each individual column is about 1/16 of an inch thick and may be several inches long.

Author
Winter comes to Yellowstone
By Stanley G Canter
Yellowstone Library and Museum Association
Published in the 1960's but no notice of copyright.
Click here to read online
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