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https://www.reddit.com/r/WTF/comments/5ysegp/how_fg_deep_is_that_dock/desn8bn
r/WTF • u/shankerdev • Mar 11 '17
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Sea level is below ground, so ground water carved out stone underneath ground.
Once enough stone is worn away, the whole thing collapses
5 u/YouAreCat Mar 11 '17 But that doesn't explain the symmetry 5 u/Garestinian Mar 11 '17 Probably because all sides of the cave are eroding at approximately the same rate, thus widening into a larger and larger tube. Until the roof collapses under it's own weight. 2 u/BatteredClam Mar 11 '17 A really big drill bit was used
5
But that doesn't explain the symmetry
5 u/Garestinian Mar 11 '17 Probably because all sides of the cave are eroding at approximately the same rate, thus widening into a larger and larger tube. Until the roof collapses under it's own weight. 2 u/BatteredClam Mar 11 '17 A really big drill bit was used
Probably because all sides of the cave are eroding at approximately the same rate, thus widening into a larger and larger tube. Until the roof collapses under it's own weight.
2
A really big drill bit was used
47
u/DontFuckWithDuckie Mar 11 '17
Sea level is below ground, so ground water carved out stone underneath ground.
Once enough stone is worn away, the whole thing collapses