Monday, 23 March 2026

Crinoids … St Cuthbert Beads …

 

Stepping on eggshells … or walking on the beach with sharp, stony pebbles … both would make us jump around trying to find a more comfortable place from which to enjoy the seashore …


"So-called
St Cuthbert's beads"
I remember a holiday I had with my father years ago up on the Northumberland coast, when we visited the tidal Holy Island of Lindisfarne – an important centre of Celtic Christianity, including St Cuthbert (c 634 – 687AD), and later the Venerable Bede (c 672 - 735AD) …


Falsies from years ago!

I don't know how many have seen the fossilised false teeth set that hit the airwaves recently … actually some crinoids ossified as the planet evolved about half a billion years ago … entitled the 'smiling fossil' see link below


Lindisfarne - Holy Island
Crinoids, marine invertebrates, can still appear … but these fossilised ones tend to be found from the Triassic era (c 250 million years ago to 200 million years ago) ...




Crinoid Stem

I realised the crinoid find … false teeth from the triassic era … rather quaint - which gave me, and continues to give me, a laugh …




Explanation of a Crinoid - via Lumen
Amazing what can be found millions of years later … protected in a layer of sediment the skeletal remains compacted, turn to rock …



One of the pinnules - before
the crinoids separate away

... the bones are dissolved by water seeping through the rock, while the minerals in the water replace the bone, leaving a rock replica of the original bone called a fossil …



As described within image
...then over geological time these replica bones become displaced leaving us with the so called “St Cuthbert's Beads' from the Jurassic era…



Triassic flora and fauna
Strange but true … false teeth idea and all?!


Happy Spring finally, though we're in for a few chilly days …


Smiling False Teeth fossil

Lumen - c/o Wiki

Crinoid - c/o Wiki

National History Museum - discover the triassic period


Hilary Melton-Butcher

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6 comments:

Alex J. Cavanaugh said...

Wild they made false teeth from fossils.

Hilary Melton-Butcher said...

Sorry Alex - the fossils looked like a set of false teeth - the BBC link shows you. I just remember reading about George Washington's false teeth - made from hippopotamus and elephant ivory, along with other bits of animal and human teeth parts ... held together with gold springs! I hope that clears it ... cheers Hilary

MELODY JACOB said...

This post brought back memories of beachcombing with kids, hunting for odd stones and shells. It’s remarkable to think those little beads we stumble upon are echoes of life from hundreds of millions of years ago. Makes a stroll along the shore feel like stepping through time, doesn’t it?

Liz A. said...

Earth processes are fascinating.

jabblog said...

That was a fascinating discovery. I think there will be many hopeful collectors searching for their own 'fossil teeth.' The collector, Christine Clark, was very observant to spot such a small, but perfect, fossil.

Anabel Marsh said...

You certainly find some intriguing topics!