Sea mist wafting up over Porth Naven beach today . It was sunny in Penzance but very foggy out on the cliffs, very quite, only the sound of the distant foghorn….a bit eerie ?
Porth Naven is also know as Cot Valley and sometimes referred to as ‘Dinosaur Egg Beach’ because of a remarkable deposit of ovoid boulders covering the beach and foreshore. 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.