Not all stalagmites are made of the same material. The guide most probably knew ... | Hacker News

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coliveira on March 13, 2018 | parent | context | favorite | on: A cliff that changed our understanding of time

Not all stalagmites are made of the same material. The guide most probably knew this, and you should have asked to get a correct explanation.

RobertRoberts on March 13, 2018 [–]

Nah, it was too awkward. The guide wasn't very old, and could have made an error.

Of course it could have been different material, but the cave is still there.

http://www.blackhillsbadlands.com/business/jewel-cave-nation...

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