Coral and Others

[fernwood]

Second posting attempt.  Sorry of there was a delay and this is a double topic

 

Central Wisconsin, USA.  Glacial Drift/Green Bay Glacial Lob W. Advance/Glacial Lake Oshkosh Area. 

Ordovician onward.  

 

Unlike anything else I have found.  Trying to identify all the various corals/critters that were preserved in this. 

 

So, have possibly identified barnacles, the abdomen end of a horseshoe crab, various shells/snails, and several corals.  Please let me know if my ID’s are way off.

 

Could this have been a coral colony that was overtaken by 1 or more other colonies?  Then, as the corals died, barnacles moved in, along with other marine life?  So fascinating. 

Putting this one in the hands of the experts here.  Camera will always focus on the size reference in my photos (cell phone camera), so cannot do that.  Size is 10.5 cm long, by 7.5 cm wide by 6 cm thick.  Hope this helps. 

 

Posted this on another forum and was told it was nothing more than a chunk of chert.  Some photos have details of what I think is there.  Thank you so much.

 

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gray coral 18

 

gray coral 17

 

gray coral 16

 

gray coral 15 close 1 words

 

gray coral 15

 

gray coral 14 close 1 words

 

gray coral 14

 

A snail shell?

 

snail

 

Posterior end of Horseshoe Crab?

 

HS Crab[/url

 

A barnacle?

 

barnacle

 

Thanks for looking.

 

 

ud 2d

[Kane]

Hm. Interesting piece. To my tired end-of-work-day eye, many of these seem to be brachiopod steinkerns.

[TqB]

I agree with @Kane, a "nest" of brachiopods.

[Fossildude19]

No horseshoe crab or corals. 

Brachiopods, and maybe some gastropods or bivalves. 

Lots of steinkerns. 
Interesting piece. 

Regards,

[fernwood]

Great.  So, not just a hunk of chert, like I was told on another forum.  Awaiting other responses.  Thanks for confirming my eye.

[Peat Burns]

+1 for brachiopod steinkern. I'm getting a Silurian "vibe"

[fernwood]

Fascinating.  Thank you.  So, it is a variety of shells whose structure became filled with ocean/lake bottom.  Then the shells disintegrated, leaving a cast of their form, which is embedded in the hardened material?  

[Fossildude19]

21 minutes ago, fernwood said:

Fascinating.  Thank you.  So, it is a variety of shells whose structure became filled with ocean/lake bottom.  Then the shells disintegrated, leaving a cast of their form, which is embedded in the hardened material?  

Exactly.   

[Phevo]

16 hours ago, fernwood said:

 

 

Brachiopod steinkerns visible

 

That's what an intermal mold of the hinges from a brachiopod look like

 

16 hours ago, fernwood said:

 

 

[fernwood]

49 minutes ago, Phevo said:

That's what an intermal mold of the hinges from a brachiopod look like

Thanks, I learned something, as I thought this area was a worn shell.  

[aek]

I agree with the others. Looks Silurian, they look like Pentamerid brachiopods to me.

[Tidgy's Dad]

Also agree with pentamerid steinkerns. 

Here's a link with other links in it!