Large Dinosaur Leg Bone?!

[TreasureHunter02]

Just purchased a couple petrified/fossil jaw bones and one very ominous (leg?) bone from an older lady who inherited these from her grandfather when he died. She also had a gigantic leg bone taller than her but sadly would not part ways with it.

 

Trying to identify what animals these belonged to and what sort of bone the large one is.

Comparing the smallest jaw bone to a modern day cow femur, they both are the same weight.

All are very heavy and the “leg” bone is extremely heavy for its size. Measuring is in inches

 

[fifbrindacier]

Hi, nice pieces. Do you know where they originally come from ?

[TreasureHunter02]

20 minutes ago, fifbrindacier said:

Hi, nice pieces. Do you know where they originally come from ?

Unfortunately not. Purchased them in north Texas but have no more information other than that. 

[fifbrindacier]

I think the teeth are from mammals, surely equus for the three first photos of teeth.

@Troodon ? @Harry Pristis ?

Edited December 15, 2021 by fifbrindacier

[fifbrindacier]

11 hours ago, jennb said:

Found these on an eroded part of the trail, going up a mountain. They were buried lined up perfectly and I noticed an outline that I thought was a spine at first, through all the fallen leaves. Still very surprised I found these while waiting for my partner to finish peeing so we could continue hiking haha. Starting digging with a small rock and uncovered 10 teeth and no other bones as far as I was able to find. I am pretty sure they are fossilized or mineralized based on how heavy they are, and rock solid. I tapped them against a rock and they make a dinging noise compared to the sound of modern bones in my collection i tried tapping against a rock that make a more dull muted sound.
I am fairly certain they are horse teeth but the one thing throwing me off is the size of the roots and lack of enamel on some of them. I know horses are hypsodonts and teeth dont usually show that much root. Does anyone have any insight on these? Thanks in advance

 

[Coco]

Hi,

 

The first jaw is from a horse I think.

 

Coco

[Troodon]

Nothing dinosaurian here will leave it up to the mammal experts to decide which one.

[fossilus]

First jaw is horse, the second and last are tapir.

[Harry Pristis]

For comparison:

 

 

[fifbrindacier]

That pushes us in the quaternary period.

Does someone has an idea of where do those come from in regard of the kind of mammals and the colour of the matrix.

I guess the bones are also from a mammal.

 

Edited December 15, 2021 by fifbrindacier

[TreasureHunter02]

29 minutes ago, fifbrindacier said:

That pushes us in the quaternary period.

Does someone has an idea of where do those come from in regard of the kind of mammals and the colour of the matrix.

I guess the bones are also from a mammal.

 

 

I’ve had a collector from a different group say they are Oligocene, comparing it to what he has found. “I’ve collected in S Dakota. The bone material is from the Brule, Chadron, and White River formations. They are Oligocene.”

 

However this would date the bones older than  what appears the tapir is unless it’s an older tapir. 

Edited December 15, 2021 by TreasureHunter02

[fossilus]

These look like stuff I find in the rivers of SE Texas. Could easily be from the Colorado, Brazos, or Trinity, or even possibly from some of the dredging from the coast.

[Harry Pristis]

Not Oligocene.  The horse appears to be equid, but I can't match it to Equus examples, probably because the teeth are so worn.  Unfortunately, tapirids are evolutionarily very conservative.  That is, they don't change much over a long period of time.  They are not the best for biochronological dating.  Could be anything from Late Miocene to Pleistocene, in my estimation. 

[fossilus]

The large bone looks like a distal probuscedian tibia, likely mammoth or mastodon.

[jpc]

32 minutes ago, fossilus said:

The large bone looks like a distal probuscedian tibia, likely mammoth or mastodon.

I agree, and I also agree that these are NOT White River Fm.  The matrix stuck to some of them is not  right for that deposit. 

 

 

[fossilus]

11 minutes ago, jpc said:

I agree, and I also agree that these are NOT White River Fm.  The matrix stuck to some of them is not  right for that deposit. 

 

 

Yes, the limonite (orange) cemented sand looks like what is commonly found in east/SE Texas, which may fit if these were purchased in Texas.

[Harry Pristis]

For comparison:

 

 

[TreasureHunter02]

Thanks for the help everyone! Cross referencing the help from here along with other platforms we have seemingly identified/narrowed down everything except this smaller bone. Also, not sure how I never realized this but these two tapir jaw bones go together haha. 

 

[fossilus]

That's a beautiful tapir jaw!

[fifbrindacier]

11 hours ago, TreasureHunter02 said:

Thanks for the help everyone! Cross referencing the help from here along with other platforms we have seemingly identified/narrowed down everything except this smaller bone. Also, not sure how I never realized this but these two tapir jaw bones go together haha. 

 

 

10 hours ago, fossilus said:

That's a beautiful tapir jaw!

Yes, a master piece, that's not found very often in that state of preservation.

Edited December 16, 2021 by fifbrindacier

[fifbrindacier]

11 hours ago, TreasureHunter02 said:

Thanks for the help everyone! Cross referencing the help from here along with other platforms we have seemingly identified/narrowed down everything except this smaller bone. Also, not sure how I never realized this but these two tapir jaw bones go together haha. 

 

I think this is a piece of the top articulation of a leg or a shoulder. I think its probably from a shoulder.

[jpc]

19 hours ago, fossilus said:

The large bone looks like a distal probuscedian tibia, likely mammoth or mastodon.

I agree with Harry... proximal tibia.  My bad.  

 

As for this last bone, that is the jaw joint of large mammal jawbone.  Compare it to the other jaw you have shown us. 

 

 

 

[fossilus]

33 minutes ago, jpc said:

I agree with Harry... proximal tibia.  

 

 

Right, proximal. The femur (proximal) has the double humped surface, the astragalus (which would be distal) is a single simple surface in the elephants.

[fifbrindacier]

On 12/15/2021 at 4:51 AM, fifbrindacier said:

I think the teeth are from mammals, surely equus for the three first photos of teeth.

@Troodon ? @Harry Pristis ?

I should have written equidae, my bad.