Natural or not?Priscacara liops Green River Formation

[nala]

Is it paint or natural?Priscacara liops Green River Formation?thanks

[snolly50]

To my eye it is not painted. Viewing under a 'scope or loupe will tell the tale for certain.

[nala]

Thanks snolly50,i tryed to use acetone on a small part and nothing go away,i think it could be natural but i have always a doubt.Is it usual to have this deep brown color in the site?

[snolly50]

1 hour ago, nala said:

Is it usual to have this deep brown color in the site?

Yes, this deep color is not uncommon. I believe I can see little clumps of matrix still adhering to the fish in many areas. If that is verified by close scrutiny, then the no paint belief is additionally supported. It would require superhuman precision to "paint around" those areas and not inadvertently get paint on them. The same is true of the margins. With paint it is almost impossible not to inadvertently touch the surrounding matrix. If no errant paint is spotted under magnification, it is not painted.

[nala]

Thanks snolly50 !

[jpc]

this is from the 18 inch layer which is typically preserved with very dark bones on grayish rock.  Most of the GRF fish we see here are form the split fish layer, which is brown bones on soft yellow rock.

[nala]

Thanks a lot jpc!