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NDfossilhunter44

Bone ID? Upper Cretaceous

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NDfossilhunter44

Hello again, I've posted this fossil before on here a couple weeks back, but I did some more uncovering of the fossil and made a few additions from rock fragments I found surrounding the fossil, so it is more complete now. It is from the fox hills formation in South Dakota, with the depositional environment being lagoonal. Professional papers collecting samples from this formation list shark teeth, mosasaur teeth, bivalves, as well as dinosaur bone fragments being found here. I think we can safely rule out bivalves though haha. The brown end of the fossil looks to be a jointed end of the bone. The black "fracture" above my thumb in the first pic looks like a bone suture, something that occurs only in skulls of vertebrates. I'm no expert on sutures but this "crack" looks like it didn't occur after death of the animal. I haven't had this theory confirmed though. Thanks again!

post-20475-0-50540000-1453577104_thumb.jpg

post-20475-0-69712300-1453577133_thumb.jpg

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Troodon

Looks like a skull element but not sure from what. Would not rule out dinosaurian.

Edit: I would also include Croc in your list of candidates

Edited by Troodon

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