mrsox03 mrsox03
  • 17-12-2015
  • Biology
contestada

what forms when water supporting the roof of a cavern drains and the roof falls

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Аноним Аноним
  • 17-12-2015
This is called a sinkhole.
Sinkholes are basically black holes in the ground, they can be hundredths of feet to only a few. 
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