Bulletin of the National Speleological Society - ISSN 0146-9517
Number 12: 32-37 - November 1950
A publication of the National Speleological Society
Ice caves are permanent caves in which ice forms and remains far into the summer or throughout the year. Several suggestions as to their origin are presented. The factors necessary for their formation are probably a rock formation with many crevices, cold winters, a good circulatory system and adequate shading in the summer. A list of ice caves in the United States is presented.
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