SN8214 : Swallow (or Sink) Holes

taken 29 years ago, near to Aber-Craf, Powys, Great Britain

Swallow (or Sink) Holes
Swallow (or Sink) Holes
Indicative of limestone areas. The limestone is eroded by water and underground cave systems may form causing collapse at the surface (collapsed swallow holes). These swallow holes are as yet just depressions in the surface.
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SN8214, 15 images   (more nearby )
  (find more nearby)
Date Taken
Wednesday, 20 September, 1989   (more nearby)
Wednesday, 18 May, 2005
Geological feature   (more nearby)
Subject Location
OSGB36: geotagged! SN 8270 1415 [10m precision]
WGS84: 51:48.8181N 3:42.1805W
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Image classification(about): Geograph
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