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Jessiejmt

Dinosaur fossil?

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Jessiejmt

Hey there,

So I’m a total newbie, and don’t have any education in fossils. But I have grown up rock hounding all over the Pacific Northwest.  Happened to be hunting for sea glass, and ran across this gem on Cat Island, Bahamas. I’ve brought it to several rock shops to try and get some information or ideas of what it might be but to no avail. 

Any ideas?   Hope it’s an interesting one for anyone to look at on here :)

C59D0ADA-85CF-4797-A81B-19A6165FF028.jpeg

90FC5641-3EB3-44CA-A09C-52702A628A9A.jpeg

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Jessiejmt

To add a couple more views& info

 

it was found in the rocks above the shore in a small cove. 

Not sure what other info might be useful?

 

5F744664-E99B-4A61-A895-14DB4B730D02.jpeg

C9A05FAE-7DD3-4BBD-BFB1-05306E50F8C1.jpeg

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fossilus

Probably not dinosaur in the Bahamas, the rocks there are far too young. Looks like a weathered mollusk.

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ynot

Welcome to TFF!

Can You see if it will scratch a knife blade or a piece of glass.

Thanks.

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Tidgy's Dad

Layered calcite? 

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ynot
2 minutes ago, Tidgy's Dad said:

Layered calcite? 

Or cryptocrystalline quartz, hence the hardness test request.:shrug:

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Jessiejmt

Wow thanks everyone for the replies! 

So it doesn’t scratch glass, tried multiple times. 

 

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abyssunder

My guess would be a bioeroded oyster fragment.

Of what I'm sure, it has really nice Entobia markings. :)

 

b.jpg.42f29ecb97e7c72f77c73e360dfd1a9a.jpga.jpg.4163ecb8774a19e8d29acf44279e6c6c.jpg

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ynot
1 minute ago, Jessiejmt said:

So it doesn’t scratch glass, tried multiple times. 

Then Tidgy's dad is probably correct with calcite,

Does it fizz when vinegar is dripped on it?

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caldigger

Looks like a piece of oyster shell.

What do you see that would make you make the leap to dinosaur?

 

Edit: looks as if abyssunder beat me to the line.

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ynot
3 minutes ago, abyssunder said:

My guess would be a bioeroded oyster fragment.

Of what I'm sure, it has really nice Entobia markings. :)

 

3 minutes ago, caldigger said:

Looks like a piece of oyster shell.

To My eyes the layering seems too thick for shell.

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abyssunder
3 minutes ago, ynot said:

To My eyes the layering seems too thick for shell.

Not necessarily. Some oysters may have very thick shells. :)

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ynot
29 minutes ago, abyssunder said:

Some oysters may have very thick shells.

I am not referring to the thickness of the shell, but to the thickness of the layers of this piece. ( Lamina)

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Jessiejmt

So i did the vinegar test and it fizzed. It wasn’t a major fizzed but definitely a reaction. 

I guess I was thinking it could’ve been a fossilized dinasour bone (aquatic of some sort) maybe rib bone, due to the thick layers and pouris edges. Also it seems to circle at the end, as if it was hollow. 

 

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abyssunder
22 minutes ago, ynot said:

I am not referring to the thickness of the shell, but to the thickness of the layers of this piece. ( Lamine{?})

It might be in range, if I include Crassostrea gryphoides or similar in the possibilities. :)

 

Figure3_0cdd230269.jpg.de73be9477901bd05e0c5e43c35280f5.jpg5c3a5bee6474b_Figure3.thumb.jpg.9b22eb54400b6c71aa68cfb9b2a8807f.jpg

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Jessiejmt

Okay what I was thinking was bone porousness was “entobia markings” ~ thanks Abyssunder

Edited by Jessiejmt
Specify markings

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Rockwood

I can't hold it any longer. I have to ask.

Any chance it's a flake of mammoth tooth ?

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caldigger
55 minutes ago, abyssunder said:

Not necessarily. Some oysters may have very thick shells. :)

 

20190112_135646.jpg

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abyssunder
13 minutes ago, Rockwood said:

Any chance it's a flake of mammoth tooth ?

Sponges bore in lithic not in osteic substrate. :)

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abyssunder
27 minutes ago, Jessiejmt said:

Okay what I was thinking was bone porousness was “entobia markings” ~ thanks Abyssunder

You are welcome. :)

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frankh8147

If it helps anyone, I think this object I found in the Bahamas a decade or so ago is very similar to yours. 

 

For what it's worth, I always thought it was some type of calcite but could be wrong...

bh1.jpg

bh2.jpg

bh5.jpg

bh6.jpg

bh9.jpg

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Jessiejmt

@frankh8147 interesting, some of the pics do look similar.  :)  

 

Edited by Jessiejmt

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will stevenson

I collect shells and I am pretty sure this is the weathered lip of some large Gastropoda maybe lobatus gigas

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Jessiejmt

@will stevenson really? It seems so thick compared to conch shells I’ve collected from that area

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PSchleis
On ‎1‎/‎12‎/‎2019 at 3:33 PM, ynot said:

Welcome to TFF!

Can You see if it will scratch a knife blade or a piece of glass.

Thanks.

Knife blade? Neat trick. I'll have to remember that.

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