I have finally come to the end of my fun with the “Mesaverde Formation” matrix. There are a few unidentified shark fossils left. I know they may remain little mysteries and that’s ok but still worth a try.
It was labeled Mesaverde by the seller but I strongly suspect it could actually be Mancos Shale. It did come from Delta County Colorado. As far as age goes, the best guess I have is Cenomanian-Turonian but it could be younger. There were Cretomanta teeth present but I honestly don’t know if they are found beyond the Turonian age.
Thats all the info I can provide about the matrix itself. On to the teeth.
1. Scyliorhinid ?
I believe this is the smallest tooth I found, under 1mm. I think it’s a Catshark but I figured I would get some other opinions. So small it was hard to photograph and move around to get better angles.