MSirmon Posted November 20, 2018 Share Posted November 20, 2018 Found this bivalve near the bank of Tablerock Lake in Beaver Arkansas. Looking for help to ID. Modern or old? Link to comment Share on other sites More sharing options...
KimTexan Posted November 20, 2018 Share Posted November 20, 2018 It is modern oyster. I don’t think they had those in the Ordovician. Someone correct me if I’m wrong. 4 Link to comment Share on other sites More sharing options...
fifbrindacier Posted November 20, 2018 Share Posted November 20, 2018 I agree there were no oyters in the ordocician. This one seems to be from the gryphea family and can be an actual shell. It wears marks of epibiotic animals. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
Wrangellian Posted November 21, 2018 Share Posted November 21, 2018 Is there any Mesozoic or Cenozoic rock overlying the Paleozoic in that area? Link to comment Share on other sites More sharing options...
verydeadthings Posted November 21, 2018 Share Posted November 21, 2018 Looks like someone was shucking oysters out there! At least I wouldn't be able to tell the difference between that shell and a modern oyster. If it's modern, it's almost certainly the commercially harvested species Crassotrea virginica. Link to comment Share on other sites More sharing options...
KimTexan Posted November 21, 2018 Share Posted November 21, 2018 32 minutes ago, Wrangellian said: Is there any Mesozoic or Cenozoic rock overlying the Paleozoic in that area? Everything there is Carboniferous and earlier. Link to comment Share on other sites More sharing options...
Wrangellian Posted November 21, 2018 Share Posted November 21, 2018 My bet is it is modern, then... Maybe some fisherman/hunter or fossicker had some oysters for lunch and disposed of the shell there, as verydeadthings suggested? Link to comment Share on other sites More sharing options...
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