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A comment on Son Doong Cave Is So Big It Has Its Own Rainforest (2019).

Re:Son Doong Cave Is So Big It Has Its Own Rainforest (2019) by ldoughty on Sunday June 25, 2023 @07:53AM (#36467257)
> With time, collapsed ceilings have created holes called dolines, allowing lush foliage to grow and creating a remote and dangerously inaccessible jungle.

I would argue that holes from a collapsed ceiling of an underground cave makes it _dangerously accessible_ underground jungle.

[ Parent | on HN ]
Re:Son Doong Cave Is So Big It Has Its Own Rainforest (2019) by SapporoChris on Sunday June 25, 2023 @12:37PM (#36470025)
Formed in Carboniferous/Permian limestone: also known as 47 million to 358 million years. Okay, this certainly wasn't in it's present state 20 million years ago. However my point is it is a very old and slow growing structure. Obviously a Doline is evidence of instability at one point in time. But when a structure exists for millions of years. Let me do the math here: 2 Dolines over 20 million years, screw it, I don't have to do the math. I'm comfortable walking through that structure.
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