Another mahantango mystery

[Miocene_Mason]

Collected the same place as the others, my guess is worm burrow but it's a little strange, I am referring to the black line with two yellow globes on either side. It branches out a little as the pictures show

[Kane]

A little difficult to make out from these photos and the "interrogation lighting." Any chance you could retake those shots in full daylight? It would help us better see the features for an ID  

 

Also, perhaps add something to give us a sense of scale, such as a ruler or pen.

[Miocene_Mason]

Sure, once I get some more sunlight, the suns not all the way out yet. I use the flashlight to try to get more contrast to show the details.

[Kane]

Even a cloudy day can be good (I actually prefer it as sunny days cast distracting shadows). I've used pinpoint lighting like a flashlight in the past, and it always ended up "washing out" the details, particularly if the camera on an iPad for instance tends to try to cancel out "noise" (annoying, and why you can't take a picture of the moon with a phone or tablet camera ). I just recently purchased a magnifying lamp pretty cheaply. It gives off a more spread out white light with the added bonus of seeing up close details through the lens  

[Miocene_Mason]

@kane I'll see if I can get my hands on one. Here's pictures of the whole fossil, hope it helps.

[Miocene_Mason]

Some more, for some reason every photo is over 3.95, even though I believe it's incorrect.

[Kane]

I can see it much more clearly now.

 

Initially, I was thinking the orange spots were possibly byrozoanal, but they do look a little more like mineral staining. 

[Miocene_Mason]

 Okay, sorry rest of the picture won't upload. What's your thought on the line and it's branchs, ichno?

[Kane]

Could be ichno...although it looks like it has more texture than that. But also possibly carbonized plant matter (?). I'm at a bit of a loss on this one. Others will chime in, I'm sure. 

[ynot]

I think it is all mineral staining, no fossil as far as I can tell.

[Miocene_Mason]

@ynotI disagree, as you can see in this picture ( outlined, as is it running back. Picture taken head-on), it has depth.

[Miocene_Mason]

If anyone is still here, I found the opposite side. See if this helps at all.

[ynot]

I think it is geologic and not a fossil.

[Wrangellian]

My guess is either ichno, or possibly plant material as Kane suggests. It's always hard to tell from pics as they are never quite good enough - better to have it in hand.

[EMP]

16 hours ago, WhodamanHD said:

If anyone is still here, I found the opposite side. See if this helps at all.

 

Those black lines in this rock are burrows, I believe. I've found plenty of them, and from what I can tell they aren't plant material (they're preserved in some kind of iron oxide, not carbon). 

 

As for the yellow marks, it really is hard to say. Mineral staining for sure, but mineral stains can form around ichnofossils or other remains. I think some more photos would help with those.