fossilzz Posted August 20, 2019 Share Posted August 20, 2019 I found this concretion in what I believe to be Lockport dolostone, which is silurian in age. At first I didn't think much of it but then I noticed the surface has a faint texture of cracked shell. I was wondering if this could be a silurian ostracoderm like Tremataspis? Link to comment Share on other sites More sharing options...
fossilzz Posted August 20, 2019 Author Share Posted August 20, 2019 Link to comment Share on other sites More sharing options...
jdp Posted August 24, 2019 Share Posted August 24, 2019 Not totally sure on the ID but I agree there's a fossil there. Can you give us some close-ups of the groove at the bottom right of the first pic? Link to comment Share on other sites More sharing options...
fossilzz Posted August 24, 2019 Author Share Posted August 24, 2019 Unfortunately this groove might have been cut by file. Originally thinking this could be a stromatolite, I crudely filed the matrix out around the sides, and slightly cut into one side to see if I could see the layers of the stromatolite. I don't believe stromatolites would have a texture of cracked shell though. Link to comment Share on other sites More sharing options...
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