Porth Nanven
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Porth Nanven, also known as Cot Valley Beach is a beach in Penwith, Cornwall, UK. It is close to St Just in Penwith.
Porth Nanven, also known as Dinosaur Egg Beach because of a remarkable deposit of ovoid boulders covering the beach and foreshore, is at the bottom of Cot Valley and is an area of special scientific interest. These boulders come in all sizes, from hen's egg to a metre or more in length, and have proved so tempting as souvenirs that they are now legally protected by the National Trust, which owns the beach. Many visitors assume that these weirdly shaped boulders are the work of the sea, which they are, but the sea of 120,000 years ago. Sea levels have changed several time since then and are now much lower than they were back then, causing the ancient beach to be suspended in the cliff high above the present level. Stand on the beach and look back towards the cliff, and you will see a wall of the rounded rocks waiting to break away and join those on the beach today.
Work was completed in December 2005 on diverting and treating the sewage which used to be deposited offshore here. It is now safe to swim in the cove.
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