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NDfossilhunter44

Fossil ID Hadrosaur Bone?

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NDfossilhunter44

Hello,

I found a fossil in the fox hills formation (Upper Cretaceous) around 6 miles east of Timber Lake, SD. I believe it is part of a dinosaur bone, or atleast a large vertebrate and was wondering if there was enough of the sample for a positive ID. The area in which I found it in is known to be a lagoonal deposition environment and I found the fossil in a thick bed of bivalves. Mosasaurs have been found in the formation but I'm not sure that this bone belongs to one of those. I tried to mostly clean it off, but there is still some encrustation.

post-20475-0-16042600-1452647681_thumb.jpg

Edited by NDfossilhunter44

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NDfossilhunter44

Here is another view of the bone, my images are too large I guess

post-20475-0-52092000-1452647756_thumb.jpg

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NDfossilhunter44

....and another one

post-20475-0-35021300-1452647865_thumb.jpg

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JarrodB

It doesn't look Mosasaur.

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jpc

dinosaur in the Fox Hills would be unusual... But I can't make a mosasur out of it. I can't make a dinosaur either, so without seeing in person, I will say... tough to tell.

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Troodon

My impression was that the Fox Hill Formation was primarly marine but did some research in Timber Lake area. I found an excellent paper who's focus is in this area and it's available online as a PDF.

PEABODY MUSEUM OF NATURAL HISTORY YALE UNIVERSITY BULLETIN 27 The Type Fox Hills Formation, Cretaceous (Maestrichtian), South Dakota Part 1. Stratigraphy and Paleoenvironments

Bottom line, The Timber Lake Member of the Fox Hill Fm is a lower unit and marine, full of bivalves. However, the Iron Lighting Member an upper unit which overlies it and underlies the Hell Creek Fm does have a record of the following found:

Turtle scutes

Crocodile bones and teeth

Hadrosaur teeth

Theropod claws

Dinosaur limb bones and vertebrae

So it's entirely possible that what you have may be dinosaurian limb bone but like jpc said hard to say from the photos and your size fragment.

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NDfossilhunter44

Thanks for the replies guys, I should have stated this before but the reason I was out there was because of the paper that Troodon posted. I didn't want to give the specific location out because it was out on private property and permission is needed to enter, but the fauna list that was found at the location is actually on page 128 of the Waage paper. After your guys' comments I was wondering if any hadrosaur enthusiasts had seen this kind of bone structure before? Thanks again!

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Troodon

Took a look at my hadrosaur bones, and the closest one that might fit the bill is the end of a scapula or tibia. Take a look and see what you think.

post-10935-0-74797600-1452719244_thumb.jpgpost-10935-0-17669200-1452719270_thumb.jpgpost-10935-0-69434900-1452720136_thumb.jpg

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NDfossilhunter44

hmmmm, there are some similarities, closest might be that it's part of a scapula of a different species but there is no way to know for sure. I should have stayed a while longer and kept digging!

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