Petrified or Fossilized Dinosaur Spike?

[slo]

I am clueless as to what this is?  It is 2 5/8 inches in length and 2 1/2 inches wide.  On the side showing where rounded, you can see what appears to be scaley skin pattern. 

On the reverse not pictured, I can see what appears to be bone fissures.  I am thinking maybe 1/2 back spike of dinosaur, petrified turtle head,  shark tooth?  I found it in Fayetteville, NC in new construction zone where they have a giant sand dirt pile from digging 2 retention ponds.  I also found two arrow heads here.  Maybe, human bone? 

Here is the reverse side of the piece I found above.  I couldn't get both photos on same post due to MB limit. 

[Miocene_Mason]

Probably not dinosaur, sorry, Geological map says it's younger. I would say it's a bone though, maybe others will know more.

[The Speeding Carno]

Certainly looks like a fossil, but as to what, it's hard to say...

[ynot]

Not seeing fossil here, just a concretion with some gravel attached.

[Miocene_Mason]

This one might have to be labeled Chunkosaurus sp. because it's extremely fragmentary, but I definitely see the fossil. I would suggest doing some recent have as to the age of the rock in your area, I think it's tertiary (sorry for the outdated term)

[jpc]

I agree with ynot; not a fossil, sorry.

[abyssunder]

I'm in the geologic camp right now, considering that the specimen in question might be an ironstone concretion. The surface pattern could be similar to the one exemplified below.

 

Link to source

[Miocene_Mason]

16 minutes ago, abyssunder said:

I'm in the geologic camp right now, considering that the specimen in question might be an ironstone concretion. The surface pattern could be similar to the one exemplified below.

 

Link to source

That was my first thought as well, but it's cut so definitively. I guess nature has a knack for making suggestively shaped objects...

[Rockwood]

I think there is a good chance this is poorly preserved plant material.  

[ynot]

2 minutes ago, Rockwood said:

I think there is a good chance this is poorly preserved plant material.  

Looks like typical "box work" structure to Me.

I see that a lot in iron rick deposits here, where there are no fossils to speak of.