Colorado mystery fossil I need help identifying

[C2fossils]

Found this in a cliff side in Colorado I am not sure but it looks like a mollusk or Crinoid bulb, DINOSAUR EGG!😆

Thanks!

 

[Ludwigia]

Hmm....there just may be some shell substance from a bivalve there, but it's certainly not a dinosaur egg or crinoid. Can you please be more specific about the location and give the stratigraphy if possible.

[westcoast]

Looks like a poorly preserved bivalve

[C2fossils]

I don’t remember exactly where in Colorado I found it I do know it was close to the Golden Gate Canyon State Park.

And the rock type was a conglomerate of quartz, sandstone, pyrite, etc.

[Fossildude19]

I vote for some sort of poorly preserved bivalve.

 

Cropped and brightened:

 

 

 

[jpc]

This is a tough one.  Looking at my geology map of CO, it looks like almost everything around that state park is Precambrian, with some tertiary volcanics.  This is not Precambrian and I doubt it is from tertiary volcanics....  

 

It does look like some remnants of shell on there and its impression, but I don't think this is very identifiable.  

 

 

[C2fossils]

Okay, thank you! 
I kind of figured it was, I just wanted a second opinion.