DE&i Posted November 7, 2017 Share Posted November 7, 2017 Sorry about posting to many photos and continued post Picked up a couple of suggestive shaped rock forms found in the Kimmeridge clay, which if I can sufficiently remove some of the finest pyrite cubic crystals I’ve ever seen. May contain some bone material underneath. But for the time being I’ve noticed these fossils protruding through some of the pyrite matrix and loose in washed matrix. Continued: I have done some homework searching for coral / echinoid spines from the Kimmeridge clay but have not found any reference to such a fossil so far. As I think they have that tell-tale appearance about them. All suggestions and help would be most welcome. Scale bar is in millimetre sections. 1 Regards.....D&E&i The only certainty with fossil hunting is the uncertainty. https://lnk.bio/Darren.Withers Link to comment Share on other sites More sharing options...
ynot Posted November 7, 2017 Share Posted November 7, 2017 4 minutes ago, DE&i said: Sorry about posting to many photos and continued post When did You do that? I think the items look like bryozoans. (?) 1 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
gavialboy Posted November 7, 2017 Share Posted November 7, 2017 i am sorry that i can not help you with the identity of what you have found, but i will say based on the pictures you found some really interesting things. i cant wait to here what they are. Link to comment Share on other sites More sharing options...
Arizona Chris Posted November 7, 2017 Share Posted November 7, 2017 The hook shaped protrusions seem reminiscent of an urchin spine. That works also with the linear lines on the surface. ?? ---------------------------------------------------------------------------------------------------------------------------- Arizona Chris Paleo Web Site: http://schursastrophotography.com/fossiladventures.html Link to comment Share on other sites More sharing options...
TqB Posted November 7, 2017 Share Posted November 7, 2017 The hooks and parallel ridges certainly look right for some cidaroid spines but the preservation is a bit unusual, like some fish spines or arthropod appendages. Can you see echinoderm cleavage on the breaks? Tarquin Link to comment Share on other sites More sharing options...
DE&i Posted November 7, 2017 Author Share Posted November 7, 2017 Thank you everyone for the interesting response’s they are all noted (i.e. research echinoderms of the Kimmeridge clay). It’s certainly an interesting piece, and frustrating in trying to establish a particular defined feature beyond what I’m showing you here. The light has failed me now to take more detailed photos and perhaps I can tease a bit more of the matrix out. And I must admit the internal preservation looks a little unusual for the spine like objects. I did spot this small object slightly obscured in the matrix which may have some relevance measuring less than 5mm. This appears to have some sort of distinct pattern on the end slightly blurred by a thin coat of pyrite. Regards.....D&E&i The only certainty with fossil hunting is the uncertainty. https://lnk.bio/Darren.Withers Link to comment Share on other sites More sharing options...
DE&i Posted November 7, 2017 Author Share Posted November 7, 2017 3 hours ago, TqB said: The hooks and parallel ridges certainly look right for some cidaroid spines but the preservation is a bit unusual, like some fish spines or arthropod appendages. Can you see echinoderm cleavage on the breaks? Hi @TqB How about a crushed fragment of the Cidaris boloniensis as found in the excellent Steve Etches collection This may be a tubercule below. Regards.....D&E&i The only certainty with fossil hunting is the uncertainty. https://lnk.bio/Darren.Withers Link to comment Share on other sites More sharing options...
TqB Posted November 7, 2017 Share Posted November 7, 2017 17 minutes ago, DE&i said: Hi @TqB How about a crushed fragment of the Cidaris boloniensis as found in the excellent Steve Etches collection This may be a tubercule below. The spines are certainly a good match. The photo doesn't convincingly show a tubercle, could too easily be another pyritic protrusion. Tarquin Link to comment Share on other sites More sharing options...
abyssunder Posted November 7, 2017 Share Posted November 7, 2017 In my opinion, you have a pretty nice cidaroid spine. Try to compare the patterns with the 'Cidaris' spine patterns from F. Stiller. 2001. Echinoid Spines from the Anisian (Middle Triassic) of Qingyan, South - western China. Palaeontology, Vol. 44, Part 3: 529-551 , although those are from the Triassic. Also, the transverse section shown in your 7-th picture might be good for an echinoid spine. some examples of modern echinoid spines in cross section: In pictures 9&10 (O.P.) is visible the bryozoan encrusted surface of the spine. There is no segmentation along the "tube", so I would rule out the other possibility that suggest a spiny crinoid column, also I've never seen a crinoid holdfast with spines/bumps. 1 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
caterpillar Posted November 8, 2017 Share Posted November 8, 2017 Not echinoid for me. Maybe crustacea http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
abyssunder Posted November 8, 2017 Share Posted November 8, 2017 reference: S. Danise et al. 2014. Ecological succession of a Jurassic shallow-water ichthyosaur fall. Nature Communications 5: 4789 1 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
DE&i Posted November 8, 2017 Author Share Posted November 8, 2017 @abyssunder that is Incredible as I’m quite sure there is some bone material underneath the pyrite crust. Regards.....D&E&i The only certainty with fossil hunting is the uncertainty. https://lnk.bio/Darren.Withers Link to comment Share on other sites More sharing options...
abyssunder Posted November 8, 2017 Share Posted November 8, 2017 Yes, That was my thought also. I see that and I associated them with the Rhabdocidaris spine from the mentioned document. Also, it is visible in the images, that the planes of broken ends are at about 45 degrees to the axis, which is characteristic to calcitic echinoid spines, nicely exemplified by Coco, in the topic below. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
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