alaraints Posted June 26, 2017 Share Posted June 26, 2017 Hello, found this in a cut limestone floor plate - I wonder what this might be. I am not a geology expert, I'm a medical researcher. The image is scanned, 10 cm real size. Regards, Alar Aints Link to comment Share on other sites More sharing options...
Coco Posted June 26, 2017 Share Posted June 26, 2017 2 ambulacra of a sea urchin, they have 5 ! Coco 5 ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
TqB Posted June 26, 2017 Share Posted June 26, 2017 They're echinoid pieces. Welcome to the forum! Edit: Beaten to the draw by Coco. 1 Tarquin Link to comment Share on other sites More sharing options...
izak_ Posted June 26, 2017 Share Posted June 26, 2017 Welcome from Australia! Nice echinoid too, never seen a cross section of one before. Link to comment Share on other sites More sharing options...
Coco Posted June 26, 2017 Share Posted June 26, 2017 Not a cross section, but the top of a sand dollar Have a look here https://www.google.fr/search?q=scutella&client=firefox-b&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi8wIbkktvUAhVNalAKHcbxCY0Q_AUICigB&biw=1413&bih=738 Coco 3 ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
sdsnl Posted June 26, 2017 Share Posted June 26, 2017 Very beautiful urchin! Link to comment Share on other sites More sharing options...
GeschWhat Posted June 26, 2017 Share Posted June 26, 2017 Beautiful! That is my kind of floor tile. Welcome to the forum! Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
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