drbush Posted January 20, 2019 Share Posted January 20, 2019 Hi friends ,can you help me with this ,I went to Aruma formation area (Cretaceous) to the north of Riyadh and found an ammonite , it is small , thin , 6.5 cm wide and 4 cm high , it was a surface find . what sp. could it be ? Link to comment Share on other sites More sharing options...
drbush Posted January 20, 2019 Author Share Posted January 20, 2019 Link to comment Share on other sites More sharing options...
drbush Posted January 20, 2019 Author Share Posted January 20, 2019 Link to comment Share on other sites More sharing options...
andreas Posted January 20, 2019 Share Posted January 20, 2019 I think it is similar to Tissotia or Hemitissotia . 1 Link to comment Share on other sites More sharing options...
abyssunder Posted January 20, 2019 Share Posted January 20, 2019 I'm not an expert in ammonites, so I could be very wrong in the ID, but if the specimen was a surface find in the Aruma Formation, I suppose it was on the top of the Linah Member or, if the specific exposion of your locality has the top sediments eroded away, it may be from the underlying Hajajah Formation. If the latter is in case, you may have something similar to Manambolites (maybe M. amardi?) which was reported from the Hajajah. Try to compare your specimen (especially the suture lines) with the specimen below, from MNHN. 2 " 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 January 22, 2019 Author Share Posted January 22, 2019 Link to comment Share on other sites More sharing options...
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