Geology of Cornwall

The rocks of Cornwall have an amazing story to tell. They have been on a journey of 8,000 miles in just 400 million years. This journey has included tropical seas, deserts, volcanic eruptions and hot granites, mineral vapours rich in tin and copper and ever-changing climate and sea levels. (Cornish Geology)

A true force of nature.

Cornish geology typically consists of black, folded slates and pale grey, blocky granites. But there are exceptions:

Polzeath Beach (north coast on the Camel estuary): Stripy slate formations in purple and pale greens.

polzeath (8)

Kynance Beach (south-west on the Lizard peninsula): Serpentinite cliffs are made up of dark green and red rocks, polished by thousands of years of crashing waves to look like shiny snakeskin.

kynance (7)

Up on the cliffs by Chapel Porth on the north coast the rocks were lighter and redder.

And at Boscastle (north coast, north Cornwall) I was intrigued by huge lumps of marble-like granite rocks along the pathway and on tops of Cornish stone walls.

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I have lived in the UK for most of my life, but when young I definitely had wanderlust and even ended up living in South Africa for several years which was a wonderful experience. I now look forward to a long and leisurely retirement doing what I like most - gardening, photography, walking and travelling.

49 thoughts on “Geology of Cornwall”

  1. I love the textures of the rocks. I remember in Izki, Oman one night when Mario and I spent the whole evening until sunset photographing the interestingly patterned rocks. I loved the pictures that came from that evening. These are fabulous, Jude. 🙂

  2. Fabulous, multi-faceted, multi coloured and textured rocks, Jude! You have taken me back to my childhood

  3. It’s easy not to notice these details when wandering around a beach. The differences in the rocks and stones are quite remarkable, and you have recorded them very well Jude.
    Regards as always, Pete. x

  4. I love this post, Jude. Beautiful captures of the variety of stones on the beach and interesting reading. We’ve signed up for several geological walks on the North Norfolk coast this summer. Now I’m even more looking forward to it!
    Wishing you a happy new week,
    Dina, Klausbernd, Siri & Selma

  5. I would never have guess how interesting photo or talk of rock and their formation might be. These are mind-blowing colorful and I’ve never seen anything like these rocks. Thank so much for sharing, Jude. Wow. 😮

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