Contrasting degrees of weathering and erosion in Carboniferous limestone rock surface at Caswell Bay in Gower.
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3 Replies to “On the rocks at Caswell Bay 25”
Great variety in shapes betweeen the lower and upper rocks – I assume that is because the lower ones are under the sea part of the day?
You are right, Emma. The lower rocks may even have had a head-start in the erosion stakes because very near to this location, at a raised level, there is an ancient preserved version of this kind of dissolution known as a palaeokarst surface. I once climbed up there to see it. It is beneath the inclined strata that you can see in this photograph at the top.
Here is a link to a post showing the palaeokarst surface. In the context shot I am sitting at the junction of the mudstone strata on the right and the palaeokarst surface to my left – maybe at a height about twenty feet above the beach level.
Great variety in shapes betweeen the lower and upper rocks – I assume that is because the lower ones are under the sea part of the day?
You are right, Emma. The lower rocks may even have had a head-start in the erosion stakes because very near to this location, at a raised level, there is an ancient preserved version of this kind of dissolution known as a palaeokarst surface. I once climbed up there to see it. It is beneath the inclined strata that you can see in this photograph at the top.
Here is a link to a post showing the palaeokarst surface. In the context shot I am sitting at the junction of the mudstone strata on the right and the palaeokarst surface to my left – maybe at a height about twenty feet above the beach level.
Wow! That was pretty mindblowing stuff…