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Dinosaur joint bone or just an eroded rock?


braat

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I'm a rock tumbler and I enjoy rock hounding as much as the tumbling. Two days ago I was hounding the river here in Medicine Hat, Alberta, Canada and found this guy...the shape stood out as it was not the usual river rounded rock I see and there have been dinosaur finds around here so I wondered if it could be a fossil. I know nothing about dinosaur fossils but it kinda looked like a joint bone?? When I got home I googled "dinosaur joint bone" and saw some images with similar shapes which brought me here. All opinions yay or nay welcome...

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Yes, a sedimentary rock that has eroded along bedding planes, softer layers and mineral veins to produce this shape. 

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Tortoise Friend.

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As the others have said, probably just a rock. But it does have a suggestive shape, so I see where you're coming from.

But yeah, it lacks the proper bone texture.

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Olof Moleman AKA Lord Trilobite

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Rock, but has the shape of a bone, very deceiving. 

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