Is this a fossil

[oldtimer]

I am wondering if this is a fossil of a crinoid of some type.  I found this is a creek in NE Oklahoma. I believe that most stuff is from the Devonian and Carboniferous time.  It is in the harder dense material

with a conglomerate of shells and other things on top

 

 .

[ynot]

Scale?

 

Not a crinoid.

[Tidgy's Dad]

There are lots of organic remains in this piece, seem to be traces of brachiopod or pelecypod shell, something that looks like a coral or byozoan (noticeably near the hole, bottom left and near the top, right of centre) and maybe a trace of a crinoid stem near the centre but it is tiny so difficult to be sure. 

Oh, and possible burrow infillings from the seabed, too. 

[Fossildude19]

The area in the center looks like Hackle Fringe  .

 

 

 

"Hackle fringe describes a set of extension fractures that are aligned en echelon and rotated away from the joint axis. ... Fractures that cross-cut a geologic boundary or other geologic structure postdate the formation of that boundary or structure."

 

LINK

[oldtimer]

Thanks  Fossildude19.  You cleared up the area I was wondering about.  I thought it may have been something that had grown on the sea bottom and then was solidified with the masses of sediment over time.  Tidgy's Dad. you are correct in all the things you saw in the top area of the rock.  Actually there are all those things all over the specimen but much larger in size.  When I get a chance I will take pics of the other sides as there are many species represented.  But good eye.