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bthemoose

I found the small bone below yesterday while out at Douglas Point in Maryland, which exposes the Aquia Formation (Paleocene - Thanetian). It has the look and feel of fossilized bones from the area and it passed the burn test, so I'm fairly sure it's a fossil. This is the most complete bone I've found at this site. Any ideas what it might be from? 

 

Side 1:

1928949421_Side1.thumb.jpg.21934477c64408a1c73fa3ab9f388658.jpg

 

Side 2:

472281240_Side2.thumb.jpg.8c519055c9e717ae27e9bdd7e2f416f0.jpg

 

Side 3: 

2121608275_Side3.thumb.jpg.cddcfd2c326a746cd9982c852e85a589.jpg

 

Side 4:

211779084_Side4.thumb.jpg.e523c0cdd47d1e3de89d0e26c72742c3.jpg

 

Ends:

Ends.thumb.jpg.bf0a076d5fd3c2c58e0f1c46f77a8e97.jpg

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siteseer

It's worn but I think it's a turtle femur.

 

Jess

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hemipristis

Concur w turtle

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Harry Pristis

For comparison:

 

turtle_femur_linedrawing.JPG.00af5ab411c9b2d054e52a0e5b07d38c.JPG

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Jeffrey P

That makes sense. Turtle shell and worn bone material are fairly common there. Great find!

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HemiHunter

Totally cool that you found a complete turtle bone, Bruce.  Congrats!

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bthemoose
8 hours ago, HemiHunter said:

Totally cool that you found a complete turtle bone, Bruce.  Congrats!


Thanks. It was quite a surprise to find a complete bone!

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fossilhunter21

Thats a nice find!   

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Fossildude19

Pretty cool.  :) 

Thanks for posting it. 

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I don't think this is a femur.  The femur and humerus of both crocs and turtles have a definite sinusoidal shape that I don't see here.  Look into other turtle and crocodile leg bones.  I think it is a lower leg bone... tib/fib or radius/ulna.  I have not done enough homework to fine tune this. 

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bthemoose

Thanks, @jpc! Looking through Google images, I see what you mean. One of the lower leg bones may be a better fit.

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