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drbush

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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 !

IMG_2021-12-20_17-21-58 (1).jpg

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It may be a rudist internal mold (upside down).

Edited by abyssunder
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" 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

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@FranzBernhard

 

Coco

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----------------------
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...

Badges-IPFOTH.jpg.f4a8635cda47a3cc506743a8aabce700.jpg Badges-MOTM.jpg.461001e1a9db5dc29ca1c07a041a1a86.jpg

 

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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 by FranzBernhard
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Here is a radiolitid rudist internal mold (H=13 cm, W=10cm) from my collection, for comparative reason:

100_5087.thumb.JPG.20188d36d3254b253752a771347a92f1.JPG100_5090.thumb.JPG.2557911a35b138e47a424f35f41b54f5.JPG100_5095.thumb.JPG.fb66d48efc1c5cacdffcff1ed020a837.JPG

 

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" 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

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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.

post-17588-0-93941600-1458650062.jpg.31a1dc1bcda324b2cc148b318076cce9.jpg

Edited by abyssunder
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" 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

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