Paleonet: Help with some fossils

[J. Kocurko]

               Is there any "shell material" with these structures?  If not, I suggest they may be sediment infilling of burrows.  The one to the right being a section off the vertical.  Just a thought.

>________________________________
> From: Jinzhuang Xue <pkuxue at pku.edu.cn>
>To: paleonet <paleonet at nhm.ac.uk> 
>Sent: Monday, June 23, 2014 4:39 AM
>Subject: Re: Paleonet: Help with some fossils
> 
>
>Hi colleagues: 
>     Thanks a lot for your information.  I attach a close-up view of two such "fossils".  Any of your further comments are welcome and would be helpful. 
>
>All the best,
>
>Jinzhuang
>
>　　　　pkuxue at pku.edu.cn
>　　　　　　　　　　2014-06-23
>
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