drbush Posted December 20, 2021 Share Posted December 20, 2021 Hi friends, I went to Aruma formation area (Campanian-Maastrichrtian) to the Norht of Riyadh city and found this large fossil , 16cm long by13cm what could it? it looks like a T-rex tooth ! Link to comment Share on other sites More sharing options...
abyssunder Posted December 20, 2021 Share Posted December 20, 2021 (edited) It may be a rudist internal mold (upside down). Edited December 20, 2021 by abyssunder 2 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...
Coco Posted December 20, 2021 Share Posted December 20, 2021 @FranzBernhard Coco 1 ---------------------- 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...
Tidgy's Dad Posted December 20, 2021 Share Posted December 20, 2021 Maybe a bivalve from the family Pinnidae? 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
FranzBernhard Posted December 21, 2021 Share Posted December 21, 2021 (edited) 10 hours ago, abyssunder said: rudist internal mold (upside down). 7 hours ago, Tidgy's Dad said: Maybe a bivalve from the family Pinnidae? Maybe both? I am seeing two different fossils here. Both seem to be molds, of course. Franz Bernhard Edited December 21, 2021 by FranzBernhard Link to comment Share on other sites More sharing options...
abyssunder Posted December 21, 2021 Share Posted December 21, 2021 Here is a radiolitid rudist internal mold (H=13 cm, W=10cm) from my collection, for comparative reason: 1 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...
drbush Posted December 21, 2021 Author Share Posted December 21, 2021 so this might be the left valve of the rudist ? Link to comment Share on other sites More sharing options...
abyssunder Posted December 21, 2021 Share Posted December 21, 2021 (edited) 4 hours ago, drbush said: so this might be the left valve of the rudist ? It's a right valve (lower valve) internal mold. The pointed end is the bottom of the valve which was attached to the hardground. Edited December 21, 2021 by abyssunder 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...
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