Dissolving Limestone at Spaniard Rocks

Shallow pools in Carboniferous Limestone with acid etching on the margins

Naturally-occurring acids in rain and sea water help in the process of weathering by which rocks are eroded. For the first time I recently noticed the patterned and textured edges of shallow depressions with just a centimetre or so of water on the horizontal surfaces of the Carboniferous Limestone at Spaniard Rocks on Rhossili Bay. These little pools seem to be showing evidence of the acid erosion process. You can almost literally see the rock dissolving around edges of the small pools.

Shallow pool in Carboniferous Limestone with acid etching on the margins

COPYRIGHT JESSICA WINDER 2013

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