jackLindr Posted October 13, 2018 Share Posted October 13, 2018 Found this fragment. Seems like it could be a relatively large thing. It's found with at lot of fossils of the kind in the last picture, if that helps. It's from Norway. And I guess that's all I know. If I was forced to guess, I'd say, maybe a sea anenomy?? Link to comment Share on other sites More sharing options...
TqB Posted October 13, 2018 Share Posted October 13, 2018 I think it's a slippage surface, effectively a small scale slickenside. I see a lot of this in fossiliferous mudrock from my local Carboniferous where portions of the rock have moved against each other at some stage. 2 Tarquin Link to comment Share on other sites More sharing options...
Raggedy Man Posted October 13, 2018 Share Posted October 13, 2018 Bottom picture appears to be a pygidium from a trilobite. ...I'm back. Link to comment Share on other sites More sharing options...
piranha Posted October 13, 2018 Share Posted October 13, 2018 The pygidial embayment is a key feature of: Ogygiocaris dilatata figure from: Henningsmoen, G. 1960 The Middle Ordovician of the Oslo Region, Norway. 13) Trilobites of the family Asaphidae. Norsk Geologisk Tidsskrift, 40:203-258 PDF LINK 2 Link to comment Share on other sites More sharing options...
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