Is This a Rock? Artifact?

[GopherDaGold]

Of course it's a rock but what a strange rock it is. I went for a walk through a creek after work today and found this stuck in the mud. I dug it out, rinsed it off in the creek then lugged it back home for a better cleaning. It weighs around 15lbs or more. The white coloring will not scratch off and is not paint, at least not recent paint. The black ring must be from being buried or underwater at a different location, prior to settling where I found it.
What struck me was how round it is when viewed from the top and side. It's also quite smooth. The bottom is broken off flat-ish as you can see by the bottom pictures.
I'm not sure it's an artifact but if someone tells me it is, I won't be too upset. Should I post it on the AII board?

 

[Woodland Detectors]

Maybe a nutting stone, huh Jim?

 

[GopherDaGold]

I got that!

 

[Woodland Detectors]

I mean laura

 

[GopherDaGold]

Dude you kill me! Anyway, I was looking at some nutting stones online and they had an indentation of some sort but hey, I'll be happy if it is!

 

[Cappy Z.]

Its a fossilized dinosaur egg.

 

[sjarchangel]

It reminds me of a stone gate / pillar newell "cap stone"

:-)

 

[GopherDaGold]

Mods, feel free to move this. I see it has quickly turned into a whats-it.

Cappy, I see that you didn't use any emoticons so it appears you are serious. Don't toy with me,

 

[creeper71]

Its a fossilized dinosaur egg.

That's what I thought it was....

 

[GopherDaGold]

After doing a bit of research I see that the shape and size resembles a Hadrosaur minus the nesting base. I hope it is though I don't see the typical cracking. I think this belongs in the Whats-It forum. I'll just be here chewing my nails.

 

[UncleVinnys]

That's a coprolite . . . petrified dinosaur dung.

Thought I'm not too sure about the dinosaur part - - OR the petrified part, for that matter!


(Sorry, I just can't help myself.)

 

[rtru]

It looks like a geode to me. http://en.wikipedia.org/wiki/Geode

 

[Deepdiger60]

Might be a wore down bowling ball rolling around in a creek for years

 

[wwwtimmcp]

we have those in the rivers and in lake erie, they call them nodules around here, just a rock that was inside shale.

 

[GopherDaGold]

we have those in the rivers and in lake erie, they call them nodules around here, just a rock that was inside shale.

I was afraid of that On soooooo many levels.

 

[oakhunter27]

they find them in limestone quarry;s around here .don't know the name of them.

 

[UncleVinnys]

It looks like a geode to me. http://en.wikipedia.org/wiki/Geode

I think so too. You can see concentric rings, indicating the geode cooled from the outside inwards.

 

[creeper71]

It looks like a geode to me. http://en.wikipedia.org/wiki/Geode

I disagree with the geode theory... Still saying possible dino egg

post your pictures here in the fossil Id Forum... http://www.thefossilforum.com/

 

[WhiskeyStill]

My first thought was old post cap...

My first thoughts are 100% right 10% of the time.

 

[collector01]

I believe its some kind of fossil. I have several I found in west virginia along side lots of different kind of fossils. Some only the size of a marble and some as big as 5 inches. Not sure what they are.