Sediment Rock?

[flyadive]

This black based color rock I just re-found in a box of house painting random stuff, must have dropped it in there by accident years ago. So what do you all think? Would a bone become fossilized with shells covering it? Just sedimentary? How old?

 

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[Kray Gelder]

This black based color rock I just re-found in a box of house painting random stuff, must have dropped it in there by accident years ago. So what do you all think? Would a bone become fossilized with shells covering it? Just sedimentary? How old?

Forgot to post pic?

 

[flyadive]

OMG I must be getting old !!!

 

[flyadive]

 

[flyadive]

Bump

 

[Red-Coat]

It appears to be composed of broken brachiopod shells and some other indeterminate marine debris. I would think that this represents detritus that has gathered around a reef or at a shoreline from wave action or ocean currents. Some folks call this “marine hash”.

There does appear to be a fragment of something larger as the central portion of the accumulation and of course it’s possible for that to be a bone fragment… but I don’t see any evidence of bone structure.

What I do see is evidence that it was hollow and surrounded by a collar-like structure that’s incomplete (ringed in red) plus what appear to be undulating sutures in various places (one such area arrowed in red). My guess is that this is a portion of an ammonoid shell or its cast.



It’s impossible to put a reliable date on this without knowing what formation it came out of. Brachiopods first appeared in the Lower Cambrian more than 500 million years ago, but are not extinct, so those could be from any period. Ammonoidea are extinct but have a very wide temporal range from 66 to 409 million years go.

 

[flyadive]

It appears to be composed of broken brachiopod shells and some other indeterminate marine debris. I would think that this represents detritus that has gathered around a reef or at a shoreline from wave action or ocean currents. Some folks call this “marine hash”.

There does appear to be a fragment of something larger as the central portion of the accumulation and of course it’s possible for that to be a bone fragment… but I don’t see any evidence of bone structure.

What I do see is evidence that it was hollow and surrounded by a collar-like structure that’s incomplete (ringed in red) plus what appear to be undulating sutures in various places (one such area arrowed in red). My guess is that this is a portion of an ammonoid shell or its cast.

View attachment 1817263

It’s impossible to put a reliable date on this without knowing what formation it came out of. Brachiopods first appeared in the Lower Cambrian more than 500 million years ago, but are not extinct, so those could be from any period. Ammonoidea are extinct but have a very wide temporal range from 66 to 409 million years go.

This was found in North western New Jersey about a mile south of the Delaware River at mill brook creek in the Delaware Watergap National Recreation area. I’m guessing that it developed there when the east coast was under water before the ice age?
I also see bone possibility On this pick ...?

 

[Red-Coat]

The bedrocks in the Delaware Water Gap were deposited during the Ordovician, Silurian, and Devonian periods, about 450 to 359 million years ago. They’re composed of erosion sediments from the Appalachian mountains that were water-carried and deposited in a shallow warm sea basin to the west of those highlands and are consequently rich in the debris of marine life from that sea.

I still don’t see anything that has a structure I would associate with bone. The piece you’re referring to looks like it might be a bryozoan fragment. Something like the bottom specimen pictured below, although that’s not the only possibility.

 

[flyadive]

Red-coat ....... thats old To me ! 359-450
MiIiiiilllliilllllllllllllllIiiaaaaaaannnnnnn years ago
I was .0006 million light years away from earth!
Just caught up in the Dark matter with some of my kin! Lol
Hard to imagine that this stuff even exists now a days !
Thank you very much for the response![emoji108]
HH and stay safe!