<p>It a sea urchin fragment, or at least a natural mold of them. They have both the rings and the angliar joints. It is not uncommon for them to break up into clusters of those plates. </p>

<p><a href="https://i.sstatic.net/RfLk3.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/RfLk3.jpg" alt="enter image description here"></a></p>

CC BY-SA 4.0
2019-07-18T22:27:15.493Z
2019-07-18T22:27:15.493Z
John
<p>These are fossilised crinoid discs. Crinoids are also known as sea lilies because of their plant-like appearance, but in fact they are animals related to starfish and sea urchins. There were many species, some modern representatives of which are still alive today. They had a long stem composed of stacked discs and topped by a flower-like bunch of feathery tentacles which filtered particles of food from the passing currents. The stem was anchored at the base to rocks on the sea floor. When they died, the stem tended to disintegrate into separate discs, and your specimen shows three or possibly four of them. They probably date from the Cretaceous. Chert, also known as flint, is a deposit of silicon dioxide which forms nodules in chalk sediments as they solidify.</p>

CC BY-SA 4.0
2019-07-17T14:08:23.460Z
https://en.wikipedia.org/wiki/Crinoid
trond hansen
CC BY-SA 4.0
2019-07-17T16:30:04.153Z
It probably not a crinoid, the fact they are jointed makes a sea urchin fragment more likely. https://jurassiccoast.org/what-is-the-jurassic-coast/all-about-fossils/fossil-finder/fossil-finder-database/410-sea-urchin/
John
CC BY-SA 4.0
2019-07-17T06:58:08.543Z
2019-07-17T06:58:08.543Z
Michael Walsby
<p><a href="https://i.sstatic.net/HB5j7.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/HB5j7.jpg" alt="dridg"></a></p>

<p>Please identify the fossil in the picture below. size of pebble is around 40mm diameter and the pebble had been broken to reveal the internal structure.</p>

CC BY-SA 4.0
2019-07-17T05:38:05.920Z
please add more details,a better location what types of rock can be found in the area.measurment of the fossils.it looks like some type of coral maybe take it to a museum for identification.
trond hansen
CC BY-SA 4.0
2019-07-17T16:23:54.993Z
Note to close votes most mineral identification criteria will not help identify a fossil. (although a scale would be helpful)
John
CC BY-SA 4.0
2019-07-18T21:59:01.760Z
@Universal_learner Thank you.
gerrit
CC BY-SA 4.0
2019-07-18T21:59:07.377Z
@John My apologies.
gerrit
<fossils>
Fossil in Chert pebble picked up on a Kent beach
John
# Fossil in Chert pebble picked up on a Kent beach

(Asked by: username_0 on 2019-07-16)

[![dridg](https://i.sstatic.net/HB5j7.jpg)](https://i.sstatic.net/HB5j7.jpg)

Please identify the fossil in the picture below. size of pebble is around 40mm diameter and the pebble had been broken to reveal the internal structure.

**Tags:** fossils

> **Comments:**
> **username_1**: please add more details,a better location what types of rock can be found in the area.measurment of the fossils.it looks like some type of coral maybe take it to a museum for identification.  
> **username_0**: Note to close votes most mineral identification criteria will not help identify a fossil. (although a scale would be helpful)  
> **username_2**: @Universal_learner Thank you.  
> **username_2**: @username_0 My apologies.  

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## 2 answers

### Answer by username_0 on 2019-07-18. Score: 1

It a sea urchin fragment, or at least a natural mold of them. They have both the rings and the angliar joints. It is not uncommon for them to break up into clusters of those plates.

[![enter image description here](https://i.sstatic.net/RfLk3.jpg)](https://i.sstatic.net/RfLk3.jpg)


---

### Answer by username_3 on 2019-07-17. Score: 0

These are fossilised crinoid discs. Crinoids are also known as sea lilies because of their plant-like appearance, but in fact they are animals related to starfish and sea urchins. There were many species, some modern representatives of which are still alive today. They had a long stem composed of stacked discs and topped by a flower-like bunch of feathery tentacles which filtered particles of food from the passing currents. The stem was anchored at the base to rocks on the sea floor. When they died, the stem tended to disintegrate into separate discs, and your specimen shows three or possibly four of them. They probably date from the Cretaceous. Chert, also known as flint, is a deposit of silicon dioxide which forms nodules in chalk sediments as they solidify.

> **Comments:**
> **username_1**: https://en.wikipedia.org/wiki/Crinoid  
> **username_0**: It probably not a crinoid, the fact they are jointed makes a sea urchin fragment more likely. https://jurassiccoast.org/what-is-the-jurassic-coast/all-about-fossils/fossil-finder/fossil-finder-database/410-sea-urchin/  

---

