Cornwall news Ancient volcanic ash found on Cornwall beach UK news

MetiNews.Com - A local geologist said it dates back 280 million years

Cornwall news Ancient volcanic ash found on Cornwall beach UK news

MetiNews.Com - A local geologist said it dates back 280 million years

Cornwall news  Ancient volcanic ash found on Cornwall beach UK news
14 January 2021 - 12:48

Breaking News ! A fascinating discovery has been made on a beach in Cornwall. Layers of an ochre, rust, brown and white substance appeared on recently exposed rock at Sandways beach, on the Rame Peninsula. And, according to a local geologist, it is ancient volcanic ash dating back to hundreds of million years ago. Rame Peninsula Beach Care, a community project aiming to clean up beaches and raise awareness of plastic pollution, shared the fascinating pictures on its Facebook page. The group wrote: "A fab and unusual geological sight to see at Sandway right now if you're into that kind of thing and are heading that way on your daily exercise.... "A large amount of sand has been washed away and I was looking at this area of recently exposed rock near the steps when I trod on part of it...

. then realised it actually wasn't solid. Not really soft either - more like a sponge. "Local geologist Vanessa Killops has helpfully explained that it's rarely exposed ancient volcanic ash from the volcano that created our amazing rhyolite pavement nearly 300 million years ago! "She said: 'The stripey stuff that looks solid but isn't is probably a bentonite clay. It was originally ash that erupted from the Cawsand volcano around 280 ish million years ago and gradually, over the years, changed to clay. Ancient volcanic ash in Cornwall (Image: Rame Peninsula Beach Care) "It is not often exposed as well as it is at the moment. I love the swirly patterns which seemed to have been well preserved. The clays and the related pink lavas sit on top of the red, rubbly looking rocks at Sandways which are sedimentary rocks deposited in a desert climate (that causes the iron in the rocks to go a rust colour). It is a very interesting beach!'" (Image: Rame Peninsula Beach Care) Bentonite clay forms from weathering of volcanic ash in seawater. Early on in the process, it is usually white or pale blue or green, but then turns to a cream colour before turning yellow, red, or brown - the same colours as the pictures above.

Source = MetiNews.Com - Cornwall

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Cornwall news Ancient volcanic ash found on Cornwall beach UK news


Cornwall news Ancient volcanic ash found on Cornwall beach UK news


Cornwall news Ancient volcanic ash found on Cornwall beach UK news


Cornwall news Ancient volcanic ash found on Cornwall beach UK news

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