drbush Posted January 1, 2019 Share Posted January 1, 2019 Hi and Happy New year all ,can you help me with this ,I went to dhtuma formation area (Jurassic) to the west of Riyadh and found a this larg bivalve , it is 9 cm long , 3cm thick . what could it be ? Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted January 1, 2019 Share Posted January 1, 2019 Happy New year! It's an internal mold or steinkern. Lovely big specimen but makes it hard to identify without knowing the species that occur at your location. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
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