There's a lot going on in this rock. Any ideas what the first couple of pics is?

[MDS201065]

So, I'm not sure where this rock is from or when, there is cretaceous to Precambrian rock in the area and it's all buried under glacial debris.  I've been removing this thing from the rock, the other pictures may be clues as to what this is?

Edited June 22, 2021 by MDS201065
Spell check....posting from phone

[Reebs]

Brachiopod? 

[hemipristis]

Reese’s Peanut Butter Cup for scale. I like it

[MDS201065]

5 hours ago, hemipristis said:

Reese’s Peanut Butter Cup for scale. I like it

Sorry it was what I had.  I am actually wishing I could delete this and try again.  

[MDS201065]

10 hours ago, Reebs said:

Brachiopod? 

I'm mostly interested in the thing that looks like a flat shell of some kind....it's very thin and I do not know if it's a shell or not. Doesn't really match my idea of a brachiopod, but I may not have the best understanding of them either...  I'm grinding through something else if I want to reveal more of it.  I'm not sure if I want to destroy what's above it to reveal more without knowing, one; what it is and two; what I'm grinding through. I'm not sure that second one is identifiable...

[FranzBernhard]

1 hour ago, MDS201065 said:

I am actually wishing I could delete this and try again.  

This is possible within 24 hours after posting.

Franz Bernhard

[JohnJ]

1 hour ago, MDS201065 said:

Sorry it was what I had.  I am actually wishing I could delete this and try again.  

 

You can add photos in a new reply to this topic.  However, it it preferred that a topic anyone has replied to is not deleted.  Others can learn from the 'journey' each topic reveals.

[MDS201065]

35 minutes ago, JohnJ said:

You can add photos in a new reply to this topic.  However, it it preferred that a topic anyone has replied to is not deleted.  Others can learn from the 'journey' each topic reveals.

Very good point.  

[Ludwigia]

3 hours ago, MDS201065 said:

I'm mostly interested in the thing that looks like a flat shell of some kind..

 

Definitely a brachiopod.

[Plax]

Glacial chert or very hard limestone cobble with paleozoic marine fossils for me including Ludwigia's brachiopod. Some are hard to see because we're looking at them in cross section. Minnesota?

[MDS201065]

1 hour ago, Ludwigia said:

 

Definitely a brachiopod.

Perhaps something like this?

[Ludwigia]

2 hours ago, MDS201065 said:

Perhaps something like this?

 

Hard to tell, since only a part of yours is visible. Brachiopods, as you may already know, can take on very many different shapes and a lot of different species have ribs of the type which are showing on your sample.