Sinkhole (geology)

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Sinkholes can appear without warning.
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Sinkhole is a term from geography.

Sinkholes form when erosion in the flow of water, underground, undermines the integrity of the surface.[1][2][3][4]

References

  1. Williams, Paul (2004). “Dolines”, Encyclopedia of Caves and Karst Science (in en). Taylor & Francis, 628–642. ISBN 978-1-57958-399-6. 
  2. Kohl, Martin (2001). Subsidence and sinkholes in East Tennessee. A field guide to holes in the ground. State of Tennessee.
  3. (2009) The Dictionary of Physical Geography, 3rd. Chichester: John Wiley & Sons. ISBN 978-1444313161. 
  4. Monroe, Watson Hiner (1970). "A glossary of Karst terminology". U.S. Geological Survey Water Supply Paper 1899-K. DOI:10.3133/wsp1899k. Research Blogging.