Possible Coprolite

[FF56]

I am new to the forum.  I found this rock (roadside) near Richardson's Rock Ranch near Madras in Jefferson County Oregon and was wondering if it was a coprolite.  It is about 3 inches by 2 inches.  It doesn't look like a thunderegg as the exterior rock is different from the thundereggs have seen.  Thank you for any information you are able to provide.  

[FF56]

Here is another photo of the rock.

[ynot]

Welcome to TFF!

Sorry, but it is not a coprolite.

It looks like an agate or jasper type rock.

[Miocene_Mason]

The only sure way to tell a coprolite from any other rock is inclusions, which this rock lacks.

[RJB]

Im going to agree with ynot.  To me its just a rock.

 

RB

[GeschWhat]

First let me welcome you to the forum!

 

Unfortunately, I'm not getting a coprolite vibe from this one. To determine whether or not a rock is a coprolite, the first thing to consider is location. Are their body fossils or other trace fossils (footprints/nests) in the area? Given you are in a fossil bearing location, as WhodamanHD stated, inclusions of bone, scales or other undigested remnants of prey are usually the easiest way to determine whether or not you have a coprolite. The morphology (shape) of the stone can also be an indicator. While coprolites come in many sizes and shapes, we look for things like pinch or other sphincter marks, folds or compaction creases. Without these indicators, chemical analysis is probably the only way to determine whether or not you have a coprolite. Since herbivore fecal matter rarely survives the fossilization process most coprolites are from carnivores and are primarily comprised of calcium phosphate; the same mineral predominant in bone. 

[FF56]

Thank you all for your responses!  I have always liked rocks and this one was different from what I am use to seeing (I live in Maine).