Montana milk river finds

[patrickhudson]

A few milk river finds.  North central Montana in the Judith river formation.  
the large first bone I figured was hadrosaur, but the more I look at the inside it seems to be a lot of sediment - so I’m not really sure how hollow it is.  Thoughts?  
the second bone is super smooth bone and has a very defined hollow inside.  Meat eater?  
the third I don’t expect much info about - it seemed to be some type of cranial bone - but I’ve got no clue.  
 

thanks for any help 

[Arion]

Nice! The third item is a pachycephalosaur dome, probably a species of Stegoceras; unlikely to be able to narrow it down further though.

[Hawk2]

My friend found this for me wasn’t allowed to tell where he went but this looks similar to your find 

[CEP]

Your last photo with the bone compared to your thumb is not the same shape, so I don't think it's a dinosaur thumb bone. 

[jpc]

I don't know about that being a pachy dome.  It is awfully small and the first, second and fourth photo of it don't look like it.

 

[Troodon]

Your two bones look like limb bones the second appears to be theropod.  You really need to remove the matrix on the first one to see whats there. 

Not sure on your last one.  Your first two photos dont look like Pachy while the last one has some appearance .  Which photo would be the top, dorsal, view.

Here is my dome from the Judith for comparison.  I believe its similar to Colepiocephale of Alberta's Foremost Fm.  There are multiple pachy in those deposits this being the smallest. 

 

[Arion]

7 hours ago, jpc said:

I don't know about that being a pachy dome.  It is awfully small and the first, second and fourth photo of it don't look like it.

 

Some Campanian pachycephalosaur domes can be quite small. This dome is only about ~60% complete. The first photo is in ventral view, preserving most of the left side of the parietal.

 

54 minutes ago, Troodon said:

Your two bones look like limb bones the second appears to be theropod.  You really need to remove the matrix on the first one to see whats there. 

Not sure on your last one.  Your first two photos dont look like Pachy while the last one has some appearance .  Which photo would be the top, dorsal, view.

Here is my dome from the Judith for comparison.  I believe its similar to Colepiocephale of Alberta's Foremost Fm.  There are multiple pachy in those deposits this being the smallest. 

 

I don't believe any of the photos provided so far are dorsal view; that would certainly be helpful! It does appear to bear some resemblance to Colepiocephale, but given that key diagnostic characters aren't preserved here (e.g., absence of squamosal shelf, posteriorly recessed lateral frontal lobes, lateral constriction at contact of postorbital and posterior supraorbital) I'm not confident enough to make that assignment at this point.

 

@patrickhudson would it be possible to see some more pictures from different angles?

[patrickhudson]

Thanks for all the input.  I’ll take the power washer to the first bone ASAP

the last one definitely has some similarities to my other pachy dome, but is also quite different - tough to tell.  

[jpc]

Power washer!  It looks like it might fall apart.  

 

I'm not saying it is not a pachy dome, but I am not sold.  I do see the similarity in the 'side' view.  Yes, a dorsal view photo would help.

 

[patrickhudson]

5 hours ago, jpc said:

Power washer!  It looks like it might fall apart.  

 

I'm not saying it is not a pachy dome, but I am not sold.  I do see the similarity in the 'side' view.  Yes, a dorsal view photo would help.

 

Maybe I’ll glue it first, then power wash it  

[jpc]

why power wash?  Water and a vegetable brush should do the same.

If you do power wash, can you show us the results?

 

 

[CEP]

On 7/22/2020 at 4:30 PM, jpc said:

why power wash?  Water and a vegetable brush should do the same.

If you do power wash, can you show us the results?

 

 

Ive tried to stop him from power washing, he won't listen. Some of the fossils break apart, some he's lucky and look pretty good.