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I tried to find a good explanation on bell holes but It apparently does not exist. I think there are multiple theories on how they form. They seem to be restricted to tropical caves and they may only form in limestone without bedding planes. Some people think bats form them but instead I think bats use them.

title	lang's cave, bell holes in the ceiling, gunung mulu national park, sarawak, malaysia 1
date yyyymmdd hr:mn	2009:12:02 17:40:57
source	Flickr
flickr_agent	alan_cressler

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Updated: 2013-05-18 19:06:58 gmt

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