cool rock - looks like petrified peach?

[KatieAnn4]

Found this in South Missouri near Lake Ozarks. We were playing along a small river.   I am new at fossil ID but love to collect cool rocks & fossils.
Mainly just wanted to share, but would love some input thoughts...

 

 

 

Edited September 11, 2017 by KatieAnn4

[Ludwigia]

What you have there is definitely not a peach, although it does look quite a bit like one, but rather a concretion

[KatieAnn4]

Thanks for sharing!  (=  I like learning (now if I can just remember LOL)

 

[Rockwood]

It seems likely that it could have originated as carbonate related to a life form. 

[RJB]

What Ludwigia said. 

 

RB

[abyssunder]

It's a cool rock, I agree. It looks to have silica-rich content, so I think it could be related to chert concretions.

 

comparative picture from here

[Ludwigia]

4 hours ago, KatieAnn4 said:

I like learning

 

That's the spirit!

[Rockwood]

31 minutes ago, abyssunder said:

It's a cool rock, I agree. It looks to have silica-rich content, so I think it could be related to chert concretions.

 

comparative picture from here

How would the void spaces in the center be explained ?

[ynot]

5 minutes ago, Rockwood said:

How would the void spaces in the center be explained ?

Softer more acid susceptible minerals that are not silicified have weathered out.

[abyssunder]

Probably as a concretion, not a nodule, which could have originated as carbonate related to a life form (as you said).

[Rockwood]

Point made