Maquoketa, Ordovician Unknown

[minnbuckeye]

I was checking out my photos this evening and came across this "unknown" from a recent hunt in NE Iowa. The geology is Ordovician/ Maquoketa.  The "fossil" was found with only the surface of #1 showing. It looked a bit sponge like to me. I tried splitting the surface off and found the left over rock had a surface shown in 2. I further split the rock into pieces 3, 4, 5, and 6. As you can see, the unknown flares out again at 6. This is probably "just a rock" but tis better to ask first.

  

Mike

 

[Rockwood]

Bryozoans commonly look like this when only partially preserved. Frequently there is a layer at the surface which gives the identification.