drbush Posted August 21, 2019 Share Posted August 21, 2019 Hi friends, can you help me with this? I went to Dhruma city, Bathonian , to the west of Riyadh and found a CRINOID like fossil. It was a surface find, it is 6 cm high, 4 cm wide at widest point, and 1 cm thick. could it be a holdfast or it is coral sp.? So what could it be? Link to comment Share on other sites More sharing options...
fifbrindacier Posted August 21, 2019 Share Posted August 21, 2019 I Don't think this is a crinoid, nor a coral either. A rudist maybe ? Could you take photos of the end it is sitting on (the one that is down on your photos), and also of the upper end ? "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
TqB Posted August 22, 2019 Share Posted August 22, 2019 I'm sure it's not a coral but crinoid holdfast seems possible - I can't find anything that looks right though. The cleavage looks echinoderm but the internal mould detail is odd, reminiscent of crinoid columnal articulation but they'd be extremely thin rings. More feasible at the top where it's thicker walled. Rudists appeared in the Late Jurassic so Bathonian would be rather early. But I don't know what it is - I hope someone recognises it! I agree more photos might help. Tarquin Link to comment Share on other sites More sharing options...
drbush Posted August 22, 2019 Author Share Posted August 22, 2019 1 Link to comment Share on other sites More sharing options...
Randyw Posted August 22, 2019 Share Posted August 22, 2019 I’m leaning toward a crinoid holdfast 1 Link to comment Share on other sites More sharing options...
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