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SE Texas - Strange bone - astragalus?


johnnyvaldez7.jv

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johnnyvaldez7.jv

I found this little bone yesterday on a river gravel bank. It's unusual.  I can't figure out how to orient it. It looks like an astragalus but not like the usual ones I see from a horse. Could be way off tho. There's a large articular surface on one side and a smaller one on the other. 

Size is 1.75 inches x 1.75 inches 

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Modern or fossilized?

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johnnyvaldez7.jv

@grandpa Hello there! It's not mineralized. But, I've learned on here that if something isn't mineralized, it doesn't mean it's not old. It was found in the same area as my other pleistocene finds... I guess it would just depend on where and how it was preserved. I was told once that something completely mineralized can "at least tell me it at least 10,000 years old."  Also I was told by someone that they've found something that looks fresh dead next to something completely mineralized in the same layer and were the same age.

I guess if I can figure out what it is and what it belongs to... it might help. Good hearing from you.  I found a bunch of stuff yesterday. When I thought I've found it all I keep finding things. Can't wait for rain and a flood to move things around. 

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I saw from your posts that you were out yesterday.  Glad to see the site is continually so productive.  You are fortunate to have such a great site so close.

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Harry Pristis

Your find vaguely reminds me of a 'gator astragalus.  See if you can make the match:

 

gatorcalcaneum.jpg.f8d92a66fa62324d689a407c3ef895c7.jpg

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johnnyvaldez7.jv

@Harry Pristis Thank you.  I've had it in hand and have rotated it numerous times trying to make it fit and can't.  Even with what's broken on mine, I still couldn't if the rest were there. Alligator was something I didn't even think about.

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Brandy Cole
On 9/11/2023 at 10:42 PM, johnnyvaldez7.jv said:

I was told once that something completely mineralized can "at least tell me it at least 10,000 years old." 

I may have been the one to tell you that a while back and have since learned that I was incorrect.  As you rightly said in your post, it really all depends on the location of the item and the process by which it mineralized.  I think mineralization, even in our area with a large amount of Pleistocene material, would be a strong indicator but not a guarantee.

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Brandy Cole

From the size, I wonder if there's a chance it's a carpal or tarsal bone that I'm unfamiliar with.

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johnnyvaldez7.jv

@Brandy Cole Thank you. Good idea.

I'm currently running through as many different carpal and tarsal bones for comparison.

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On 9/11/2023 at 10:28 PM, johnnyvaldez7.jv said:

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This surface here makes me think this could possibly be one of the zygapophyses from a vertebra if you're still struggling to make this fit any carpals/tarsals. Just another idea to entertain as a possibility perhaps.

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