Here are some really unusual rocks that are incorporated in sea walls around Lyme Regis in Dorset, UK. I don’t know what they are. Perhaps you do. I’d love to know what they are. I’m uncertain whether they are local in origin – maybe picked up from the beach – or whether they have been imported from elsewhere. Some of the rocks used in the construction of The Cobb sea defence and harbour were quarried on the Isle of Portland further east along the Dorset coast. Other Cobb rocks were shipped in from much further afield – Norway, I think.
I’m struck by the honey-comb appearance of these sea wall rocks, the networks of cavities and intricate partitions in the stone – almost bubbly and volcanic. I am wondering whether the holes in the rock are an integral part of the rock’s formation or whether they represent the effects of years of driving rain and pounding seas dissolving softer areas of the stone and leaving harder parts relatively unaffected. It’s a bit of a puzzle.
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