Unknown Fossil From Colorado

[Rockhounder1]

I found this in a shale bed in Colorado. I found sand crab tunnel fossils and she'll fossils in the same area.

[Auspex]

Very curious!

Do the features go through to the other side?

Do you know the geologic age?

[Rockhounder1]

There are two that go through to the other side. They are slightly larger in diameter. I will post a picture of the other side. I found the fossil in a shale bed above the Mancos shale layer.

[Rockhounder1]

Side two of unknown fossil

[Rockhounder1]

Around 70 to 80 million years

[Auspex]

All lined up like that, but not all go through...this is getting weirder!

[ynot]

How thick is the rock?

Tony

[Rockhounder1]

The rock is 1/2 inch thick. My thoughts were halocite coral or perhaps a toothless section of jawbone. I have found a lot of various shells in the Mancos layer just below this. I have also found large ammonite sections (3" diameter) in the same layer but several miles away. This was the first time I explored this particular area and I mostly found sand crab tunnels which are very common around here. Thanks for your help.

[abyssunder]

As I see,the distance between the tubular holes is aprox. the same. I don`t think they are crustacean made tunnels.