A Mountain Hut Production

                              

Brecon Beacons National Park Online Guide - Take nothing but photographs Kill nothing but time Leave nothing but footprints
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Geology in the Brecon Beacons

  
 

 
 

  


 


Swallow hole, sink hole doline three different names for a steep sided depression commonly found in certain limestone locales in the Brecon Beacons.  There are two kinds of doline a collapsed doline caused as its name would suggest by the surface ground dropping away into a space most probably vacated by the action of water on soluble limestone. secondly a solution doline surface streams may disappear from the base of swallow or sink holes into underground water courses running through a cave system.

 

  

 

  
 

  

 

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Keith Rapado © 2002  All rights reserved. Revised: 07 February 2008
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