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4150 Views 13 Replies Last post: Oct 8, 2015 7:26 AM by Helen RSS
Currently Being Moderated

Sep 23, 2015 1:54 AM

Help with South Wales fossils



I'm new to fossil hunting, this is my first week! I've spent a couple of afternoons out on the South Wales coast between Lavernock and Penarth. I've found some great ammonites and shells, which I've pictured but I'm really hoping you can help me with the things I have no idea about!


Here's the shells and ammonites....


Shells Lavernock Sept 15.JPG

Ammonites Lavernock Sept 15.JPG


So I found this, which initially I was hoping was vertabrae but now I'm thinking just weird rock shapes/pseudofossils...


Lavernock yellow&brown top view.JPG


Then I found this, which going on a single photo I found online I'm thinking may actually be a vertabrae? It's a weird shape so difficult to photograph but it's a definite bow in yellow and red with honeycombing in grey rock.


Bow shaped colouration vert? side view.JPG


I also found this, which I'm hoping (fingers crossed) may be bone or tooth....


Unknown Lavernock 1.JPG


This was in a rock I split, probably just weird formation but just in case....


Unknown Lavernock 2.JPG

Unknown Lavernock 2 side b.JPG


I also found these weird crystalised formations, are they anything interesting?


Oval crystal Lavernock side&top.JPG


Crystalised blob Lavernock.JPG


I also found two nodules with weird brown shaped knobbly bits coming out in multiple points (the picture is just of one of them). Is this anything?


Nodule 1 Lavernock top view.JPG


Nodule 1 Lavernock side view.JPG


Sorry if I've posted too many, don't want to bombard you! Thank you for any help or insight you can give - it's very much appreciated as there's so much to learn!



  • Currently Being Moderated
    Sep 23, 2015 5:39 PM (in response to Helen)
    Re: Help with South Wales fossils

    Hi Helen


    You have been collecting from the youngest Triassic to earliest Jurassic rocks - say 200 million years old.  Last week I was on Exmoor and could see those very cliffs across the Bristol Channel (we also saw Harbour Porpoises when at Portlock Weir)


    That is rather a lot to handle in one go!  let's number them from 1 to 11 from the top down.


      1. A variety of bivalves (pity not wet when photgraphed)

      2. A variety of ammonites (ditto) - various sizes and states of preservation, plus some vein calcite

      3. Hard to see but the larger right-hand sde block seems to have a large bivalve shell on the top (insie of an oyster?)

      4. Doesn't look like bone to me - a hard cemented mudstone nodule I think (may be part of a very large ammonite).  Don't understand your reference to "bow in yellow and red"?

      5. Possibly the "Rhaetic bone bed" - shelly limestone with possibly some dark bone fragments (Google it)

      6. Hard to say; could be impression of fossil wood or just a sheet of mineral growth (calcite?)

      7. Can't say much from this angle - is it a view one of the others or something on its own?  Looks like some calcite or dolomite sheet veins (does it fizz with acid?)

      8. Calcite crystals in veins which have broken open (originally a "septarian nodule")

      9. Probably eroded calcite "Beef" crystals (fizz with acid?)

    10. Eroded sheet of septarian nodule sheet calcite (ferroan calcite?)

    11. As for 10.


    See this image about Septarian Nodules from the Lower Jurassic (open in new tab to read):-

    Septarian nodules L.jpg

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  • Currently Being Moderated
    Sep 23, 2015 10:38 PM (in response to Helen)
    Re: Help with South Wales fossils

    Nice fossils Helen, similar to the Yorkshire coast.



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      • Currently Being Moderated
        Sep 25, 2015 8:16 PM (in response to Helen)
        Re: Help with South Wales fossils

        Don't know exactly were on your coast but there has been some good bone material being found.

        You will know when you find a fossil rib or vert and if you are very lucky it is possible to find many bones in rocks all together.

        Keep hunting and sharing your finds, good luck.



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  • Currently Being Moderated
    Oct 1, 2015 10:42 AM (in response to Helen)
    Re: Help with South Wales fossils


    Don't forget you can always bring fossils in to the National Museum of Wales in Cardiff, where we have palaeontologists who are experts with local fossils.

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