Belemnites?

[Planko]

Hello everyone. Picked this group of what I believe are belemnites while hunting in the NSR. There are a lot of belemnites castings within the NSR. Mainly small pieces of black or red. Blacks are much more common. Then, like the NSR seems to do, you get something like this that makes me have to come here and bug you folks. All I have done is brushed it with water and a toothbrush. It was found near the Ben Franklin bridge. Here are the questions. Is it a group of belemnites? What species if possible? Do they have the actual shell? By the way the "shell" has almost a coffee sheen to it when wet. 

 

[TqB]

They're not belemnites (the "castings" you've been finding are pieces of the actual belemnite rostra). They could be Baculites  with the outer shell preserved. I'm not familiar with NSR stuff though, just belemnites in general!

Edited August 23, 2020 by TqB

[abyssunder]

May they be bivalves or infills of bivalve borings similar to Gastrochaenolites? 

[Planko]

Thanks for the info. Learning a lot today. Baculites with the outer shell preserved would be very cool. Something new to add from the NSR. 

[minnbuckeye]

 

 This picture reminds me of a razor clam. Especially the right side.

 

[Planko]

 

9 hours ago, minnbuckeye said:

 

 This picture reminds me of a razor clam. Especially the right side.

 

Now wouldn't that be something. I am not sure if they were around during that period. They are in the hard grey matrix. I do not see the end of any of them. Anyone out there able to tell the difference? 

[Al Dente]

The growth lines are consistent with Baculites.