Found in a rock

[Don in MO]

I was looking for flint and when I broke this rock I saw this. I have tried to do some research on it without much luck.

Found in Cedar County Missouri. According to the Missouri Geological website this county is about 90% Mississippian with

a small amount of Ordovician. The protruding piece sticking out is 11/16ths" (1.8cm) in length and 1/2" (1.2cm) in width.

The bottom piece is 1 1/4" (3.2cm) in length and 11/16ths" (1.8cm) in width.

Thank You for any help that you might give. I do have other pictures.

Don in MO

 

[MSirmon]

I honesty have no idea but look forward to what the experts on here have to say.

[jpc]

I see serrations....

[Fossildude19]

Can you take pictures of the item from the other side, top and bottom?

Preferably in daylight, with something in the photo for scale.

Regards,

[LordTrilobite]

Looks interesting!

[Don in MO]

I'm not sure how two copies of the same picture ended up in my post, if it is possible perhaps someone

could remove one. The 'face' of this piece measures 5 " high and 3 1/2 " wide.

 

[Don in MO]

I feel very lucky that when this rock split it opened up the way it did. At first glance I thought "how did a piece of

iron get in this rock?"

[Don in MO]

It is very overcast here today so I don't think I could get a very good picture outside. Hopefully, there will sunshine tomorrow and I can take more then if needed. Here is one more. I hope it helps.

 

[Fossildude19]

Looks like the cavities are from brachiopod imprints. Possibly spiriferids. 

The "serrations" are the remnants of the plications on the shells.

 

 

            

[Herb]

possibly  brachiopod shells. Judging from the bryozoa these are Mississippian in age

[abyssunder]

Yes. I see them now. Tim is right.

[FossilDudeCO]

Thanks @Fossildude19

Great eye, I was seeing serrations just like JP!