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A second large Clam or Oyster?

 

I dug a huge piece of limestone out of the hill and split it into three with a sledge hammer so that I could actually pick pieces up. After the heat this weekend, they were easy to pick apart once I got them home. Yesterday, I found the first piece. This is the one I found today. When it came out of the rock I was a bit shocked at how large it was. I carefully tapped around the specimen and was able to remove most of the surrounding rock carefully.

 

This is the larger of the two pieces I found this weekend. I have less confidence in identifying it as has less features than the first piece.

 

You can see shell material flaking off in the 3rd and 4th photos below.

 

The fossil after I found it:

 

FC4552B6-48C9-42FE-99A2-E5289E2E7875.jpe

 

86E7DC93-9A1B-407B-ADEA-A42609C603F4.jpe

 

12500D72-A2E4-4508-AFB2-1E008446F84B.jpe

 

DB478E61-A23A-429E-B32E-A6F0579F82EC.jpe

 

Then, once I removed it from the rock:

 

C18EB8B9-E8B2-4A19-AC8E-A75AE2E1412D.jpe

 

DB109AEF-1B81-4DD7-B6C1-EBDE1BC770F2.jpe

 

75BE7AA4-13A7-4D82-A46A-5E7E38C767B6.jpe

 

 

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hemipristis
22 hours ago, cngodles said:

A second large Clam or Oyster?

 

I dug a huge piece of limestone out of the hill and split it into three with a sledge hammer so that I could actually pick pieces up. After the heat this weekend, they were easy to pick apart once I got them home. Yesterday, I found the first piece. This is the one I found today. When it came out of the rock I was a bit shocked at how large it was. I carefully tapped around the specimen and was able to remove most of the surrounding rock carefully.

 

This is the larger of the two pieces I found this weekend. I have less confidence in identifying it as has less features than the first piece.

 

You can see shell material flaking off in the 3rd and 4th photos below.

 

The fossil after I found it:

 

12500D72-A2E4-4508-AFB2-1E008446F84B.jpe

 

 

 

To me, this photo best illustrates your find. I do believe you're correct that it is a shell. I am unfamiliar with Pennsylvanian marine fossils. I think it is probably mollusk, as I don't think that brachiopods get that large, but I will defer to our brachiopods junkies here at TFF with that.  Let me see what I can dig up in terms of references.

Do you know the formation?  Alternately, the exact location of the find?

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Formation is Glenshaw Formation. Probably the Woods Run Limestone. I have yet to find any limestone further up in the strata after months of searching.

 

The find was near my house. Im in South Western Armstrong County, PA.

B0837F25-BF2A-4D19-8C0A-96C6892EF2DA.jpeg

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A friend of mine suggested Solenocheilus. It might be the body chamber which tend to be wide and square shaped.

 

I believe this is one shown here: 

 

But with it only being the steinkern, that might be the closest I get identifying it.

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